Metrics¶

Service level controller¶

Repair¶

scyllanode_ops_finished_percentage¶

Finished percentage of node operation on this shard

• Type: gauge

• Component: node_ops

• Key: finished_percentage

Storage service¶

scyllanode_operation_mode¶

The operation mode of the current node. UNKNOWN = 0, STARTING = 1, JOINING = 2, NORMAL = 3, LEAVING = 4, DECOMMISSIONED = 5, DRAINING = 6, DRAINED = 7, MOVING = 8, MAINTENANCE = 9

• Type: gauge

• Component: node

• Key: operation_mode

View update generator¶

scyllaview_update_generator_pending_registrations¶

Number of tasks waiting to register staging sstables

• Type: gauge

• Component: view_update_generator

• Key: pending_registrations

scyllaview_update_generator_queued_batches_count¶

Number of sets of sstables queued for view update generation

• Type: gauge

• Component: view_update_generator

• Key: queued_batches_count

scyllaview_update_generator_sstables_to_move_count¶

Number of sets of sstables which are already processed and wait to be moved from their staging directory

• Type: gauge

• Component: view_update_generator

• Key: sstables_to_move_count

scyllaview_update_generator_sstables_pending_work¶

Number of bytes remaining to be processed from SSTables for view updates

• Type: gauge

• Component: view_update_generator

• Key: sstables_pending_work

Logalloc¶

scyllalsa_total_space_bytes¶

Holds a current size of allocated memory in bytes.

• Type: gauge

• Component: lsa

• Key: total_space_bytes

scyllalsa_used_space_bytes¶

Holds a current amount of used memory in bytes.

• Type: gauge

• Component: lsa

• Key: used_space_bytes

scyllalsa_small_objects_total_space_bytes¶

Holds a current size of small objects memory region in bytes.

• Type: gauge

• Component: lsa

• Key: small_objects_total_space_bytes

scyllalsa_small_objects_used_space_bytes¶

Holds a current amount of used small objects memory in bytes.

• Type: gauge

• Component: lsa

• Key: small_objects_used_space_bytes

scyllalsa_large_objects_total_space_bytes¶

Holds a current size of allocated non-LSA memory.

• Type: gauge

• Component: lsa

• Key: large_objects_total_space_bytes

scyllalsa_non_lsa_used_space_bytes¶

Holds a current amount of used non-LSA memory.

• Type: gauge

• Component: lsa

• Key: non_lsa_used_space_bytes

scyllalsa_free_space¶

Holds a current amount of free memory that is under lsa control.

• Type: gauge

• Component: lsa

• Key: free_space

scyllalsa_occupancy¶

Holds a current portion (in percents) of the used memory.

• Type: gauge

• Component: lsa

• Key: occupancy

scyllalsa_segments_compacted¶

Counts a number of compacted segments.

• Type: counter

• Component: lsa

• Key: segments_compacted

scyllalsa_memory_compacted¶

Counts number of bytes which were copied as part of segment compaction.

• Type: counter

• Component: lsa

• Key: memory_compacted

scyllalsa_memory_allocated¶

Counts number of bytes which were requested from LSA.

• Type: counter

• Component: lsa

• Key: memory_allocated

scyllalsa_memory_evicted¶

Counts number of bytes which were evicted.

• Type: counter

• Component: lsa

• Key: memory_evicted

scyllalsa_memory_freed¶

Counts number of bytes which were requested to be freed in LSA.

• Type: counter

• Component: lsa

• Key: memory_freed

Schema¶

Ldap role manager¶

Types¶

Row cache¶

scyllacache_bytes_used¶

current bytes used by the cache out of the total size of memory

• Type: gauge

• Component: cache

• Key: bytes_used

scyllacache_bytes_total¶

total size of memory for the cache

• Type: gauge

• Component: cache

• Key: bytes_total

scyllacache_partition_hits¶

number of partitions needed by reads and found in cache

• Type: counter

• Component: cache

• Key: partition_hits

scyllacache_partition_misses¶

number of partitions needed by reads and missing in cache

• Type: counter

• Component: cache

• Key: partition_misses

scyllacache_partition_insertions¶

total number of partitions added to cache

• Type: counter

• Component: cache

• Key: partition_insertions

scyllacache_row_hits¶

total number of rows needed by reads and found in cache

• Type: counter

• Component: cache

• Key: row_hits

scyllacache_dummy_row_hits¶

total number of dummy rows touched by reads in cache

• Type: counter

• Component: cache

• Key: dummy_row_hits

scyllacache_row_misses¶

total number of rows needed by reads and missing in cache

• Type: counter

• Component: cache

• Key: row_misses

scyllacache_row_insertions¶

total number of rows added to cache

• Type: counter

• Component: cache

• Key: row_insertions

scyllacache_row_evictions¶

total number of rows evicted from cache

• Type: counter

• Component: cache

• Key: row_evictions

scyllacache_row_removals¶

total number of invalidated rows

• Type: counter

• Component: cache

• Key: row_removals

scyllacache_rows_dropped_by_tombstones¶

Number of rows dropped in cache by a tombstone write

• Type: counter

• Component: cache

• Key: rows_dropped_by_tombstones

scyllacache_rows_compacted_with_tombstones¶

Number of rows scanned during write of a tombstone for the purpose of compaction in cache

• Type: counter

• Component: cache

• Key: rows_compacted_with_tombstones

scyllacache_static_row_insertions¶

total number of static rows added to cache

• Type: counter

• Component: cache

• Key: static_row_insertions

scyllacache_concurrent_misses_same_key¶

total number of operation with misses same key

• Type: counter

• Component: cache

• Key: concurrent_misses_same_key

scyllacache_partition_merges¶

total number of partitions merged

• Type: counter

• Component: cache

• Key: partition_merges

scyllacache_partition_evictions¶

total number of evicted partitions

• Type: counter

• Component: cache

• Key: partition_evictions

scyllacache_partition_removals¶

total number of invalidated partitions

• Type: counter

• Component: cache

• Key: partition_removals

scyllacache_mispopulations¶

number of entries not inserted by reads

• Type: counter

• Component: cache

• Key: mispopulations

scyllacache_partitions¶

total number of cached partitions

• Type: gauge

• Component: cache

• Key: partitions

scyllacache_rows¶

total number of cached rows

• Type: gauge

• Component: cache

• Key: rows

scyllacache_reads¶

number of started reads

• Type: counter

• Component: cache

• Key: reads

scyllacache_reads_with_misses¶

number of reads which had to read from sstables

• Type: counter

• Component: cache

• Key: reads_with_misses

scyllacache_active_reads¶

number of currently active reads

• Type: gauge

• Component: cache

• Key: active_reads

scyllacache_sstable_reader_recreations¶

number of times sstable reader was recreated due to memtable flush

• Type: counter

• Component: cache

• Key: sstable_reader_recreations

scyllacache_sstable_partition_skips¶

number of times sstable reader was fast forwarded across partitions

• Type: counter

• Component: cache

• Key: sstable_partition_skips

scyllacache_sstable_row_skips¶

number of times sstable reader was fast forwarded within a partition

• Type: counter

• Component: cache

• Key: sstable_row_skips

scyllacache_pinned_dirty_memory_overload¶

amount of pinned bytes that we tried to unpin over the limit. This should sit constantly at 0, and any number different than 0 is indicative of a bug

• Type: counter

• Component: cache

• Key: pinned_dirty_memory_overload

scyllacache_rows_processed_from_memtable¶

total number of rows in memtables which were processed during cache update on memtable flush

• Type: counter

• Component: cache

• Key: rows_processed_from_memtable

scyllacache_rows_dropped_from_memtable¶

total number of rows in memtables which were dropped during cache update on memtable flush

• Type: counter

• Component: cache

• Key: rows_dropped_from_memtable

scyllacache_rows_merged_from_memtable¶

total number of rows in memtables which were merged with existing rows during cache update on memtable flush

• Type: counter

• Component: cache

• Key: rows_merged_from_memtable

scyllacache_range_tombstone_reads¶

total amount of range tombstones processed during read

• Type: counter

• Component: cache

• Key: range_tombstone_reads

scyllacache_row_tombstone_reads¶

total amount of row tombstones processed during read

• Type: counter

• Component: cache

• Key: row_tombstone_reads

scyllacache_rows_compacted¶

total amount of attempts to compact expired rows during read

• Type: counter

• Component: cache

• Key: rows_compacted

scyllacache_rows_compacted_away¶

total amount of compacted and removed rows during read

• Type: counter

• Component: cache

• Key: rows_compacted_away

Stream manager¶

scyllastreaming_total_incoming_bytes¶

Total number of bytes received on this shard.

• Type: counter

• Component: streaming

• Key: total_incoming_bytes

scyllastreaming_total_outgoing_bytes¶

Total number of bytes sent on this shard.

• Type: counter

• Component: streaming

• Key: total_outgoing_bytes

scyllastreaming_finished_percentage¶

Finished percentage of node operation on this shard

• Type: gauge

• Component: streaming

• Key: finished_percentage

Mapreduce service¶

scyllamapreduce_service_requests_dispatched_to_other_nodes¶

how many mapreduce requests were dispatched to other nodes

• Type: total_operations

• Component: mapreduce_service

• Key: requests_dispatched_to_other_nodes

scyllamapreduce_service_requests_dispatched_to_own_shards¶

how many mapreduce requests were dispatched to local shards

• Type: total_operations

• Component: mapreduce_service

• Key: requests_dispatched_to_own_shards

scyllamapreduce_service_requests_executed¶

how many mapreduce requests were executed

• Type: total_operations

• Component: mapreduce_service

• Key: requests_executed

Row level¶

scyllarepair_tx_row_nr¶

Total number of rows sent on this shard.

• Type: counter

• Component: repair

• Key: tx_row_nr

scyllarepair_rx_row_nr¶

Total number of rows received on this shard.

• Type: counter

• Component: repair

• Key: rx_row_nr

scyllarepair_tx_row_bytes¶

Total bytes of rows sent on this shard.

• Type: counter

• Component: repair

• Key: tx_row_bytes

scyllarepair_rx_row_bytes¶

Total bytes of rows received on this shard.

• Type: counter

• Component: repair

• Key: rx_row_bytes

scyllarepair_tx_hashes_nr¶

Total number of row hashes sent on this shard.

• Type: counter

• Component: repair

• Key: tx_hashes_nr

scyllarepair_rx_hashes_nr¶

Total number of row hashes received on this shard.

• Type: counter

• Component: repair

• Key: rx_hashes_nr

scyllarepair_row_from_disk_nr¶

Total number of rows read from disk on this shard.

• Type: counter

• Component: repair

• Key: row_from_disk_nr

scyllarepair_row_from_disk_bytes¶

Total bytes of rows read from disk on this shard.

• Type: counter

• Component: repair

• Key: row_from_disk_bytes

Advanced rpc compressor¶

scyllarpc_compression_bytes_sent¶

bytes written to RPC connections, before compression

• Type: counter

• Component: rpc_compression

• Key: bytes_sent

scyllarpc_compression_compressed_bytes_sent¶

bytes written to RPC connections, after compression

• Type: counter

• Component: rpc_compression

• Key: compressed_bytes_sent

scyllarpc_compression_compressed_bytes_received¶

bytes read from RPC connections, before decompression

• Type: counter

• Component: rpc_compression

• Key: compressed_bytes_received

scyllarpc_compression_messages_received¶

RPC messages received

• Type: counter

• Component: rpc_compression

• Key: messages_received

scyllarpc_compression_messages_sent¶

RPC messages sent

• Type: counter

• Component: rpc_compression

• Key: messages_sent

scyllarpc_compression_bytes_received¶

bytes read from RPC connections, after decompression

• Type: counter

• Component: rpc_compression

• Key: bytes_received

scyllarpc_compression_compression_cpu_nanos¶

nanoseconds spent on compression

• Type: counter

• Component: rpc_compression

• Key: compression_cpu_nanos

scyllarpc_compression_decompression_cpu_nanos¶

nanoseconds spent on decompression

• Type: counter

• Component: rpc_compression

• Key: decompression_cpu_nanos

Compaction manager¶

scyllacompaction_manager_compactions¶

Holds the number of currently active compactions.

• Type: gauge

• Component: compaction_manager

• Key: compactions

scyllacompaction_manager_pending_compactions¶

Holds the number of compaction tasks waiting for an opportunity to run.

• Type: gauge

• Component: compaction_manager

• Key: pending_compactions

scyllacompaction_manager_completed_compactions¶

Holds the number of completed compaction tasks.

• Type: counter

• Component: compaction_manager

• Key: completed_compactions

scyllacompaction_manager_failed_compactions¶

Holds the number of failed compaction tasks.

• Type: counter

• Component: compaction_manager

• Key: failed_compactions

scyllacompaction_manager_postponed_compactions¶

Holds the number of tables with postponed compaction.

• Type: gauge

• Component: compaction_manager

• Key: postponed_compactions

scyllacompaction_manager_backlog¶

Holds the sum of compaction backlog for all tables in the system.

• Type: gauge

• Component: compaction_manager

• Key: backlog

scyllacompaction_manager_normalized_backlog¶

Holds the sum of normalized compaction backlog for all tables in the system. Backlog is normalized by dividing backlog by shard’s available memory.

• Type: gauge

• Component: compaction_manager

• Key: normalized_backlog

scyllacompaction_manager_validation_errors¶

Holds the number of encountered validation errors.

• Type: counter

• Component: compaction_manager

• Key: validation_errors

Gossiper¶

scyllagossip_heart_beat¶

Heartbeat of the current Node.

• Type: counter

• Component: gossip

• Key: heart_beat

scyllagossip_live¶

How many live nodes the current node sees

• Type: gauge

• Component: gossip

• Key: live

scyllagossip_unreachable¶

How many unreachable nodes the current node sees

• Type: gauge

• Component: gossip

• Key: unreachable

View¶

scyllacolumn_family_view_updates_pushed_remote¶

Number of updates (mutations) pushed to remote view replicas

• Type: total_operations

• Component: column_family

• Key: view_updates_pushed_remote

scyllacolumn_family_view_updates_failed_remote¶

Number of updates (mutations) that failed to be pushed to remote view replicas

• Type: total_operations

• Component: column_family

• Key: view_updates_failed_remote

scyllacolumn_family_view_updates_pushed_local¶

Number of updates (mutations) pushed to local view replicas

• Type: total_operations

• Component: column_family

• Key: view_updates_pushed_local

scyllacolumn_family_view_updates_failed_local¶

Number of updates (mutations) that failed to be pushed to local view replicas

• Type: total_operations

• Component: column_family

• Key: view_updates_failed_local

scyllacolumn_family_view_updates_pending¶

Number of updates pushed to view and are still to be completed

• Type: gauge

• Component: column_family

• Key: view_updates_pending

scyllaview_builder_pending_bookkeeping_ops¶

Number of tasks waiting to perform bookkeeping operations

• Type: gauge

• Component: view_builder

• Key: pending_bookkeeping_ops

scyllaview_builder_steps_performed¶

Number of performed build steps.

• Type: counter

• Component: view_builder

• Key: steps_performed

scyllaview_builder_steps_failed¶

Number of failed build steps.

• Type: counter

• Component: view_builder

• Key: steps_failed

scyllaview_builder_builds_in_progress¶

Number of currently active view builds.

• Type: gauge

• Component: view_builder

• Key: builds_in_progress

Data dictionary¶

Maintenance socket role manager¶

Batchlog manager¶

scyllabatchlog_manager_total_write_replay_attempts¶

Counts write operations issued in a batchlog replay flow. The high value of this metric indicates that we have a long batch replay list.

• Type: counter

• Component: batchlog_manager

• Key: total_write_replay_attempts

Client¶

scyllas3_nr_connections¶

Total number of connections

• Type: gauge

• Component: s3

• Key: nr_connections

scyllas3_nr_active_connections¶

Total number of connections with running requests

• Type: gauge

• Component: s3

• Key: nr_active_connections

scyllas3_total_new_connections¶

Total number of new connections created so far

• Type: counter

• Component: s3

• Key: total_new_connections

scyllas3_total_read_requests¶

Total number of object read requests

• Type: counter

• Component: s3

• Key: total_read_requests

scyllas3_total_write_requests¶

Total number of object write requests

• Type: counter

• Component: s3

• Key: total_write_requests

scyllas3_total_read_bytes¶

Total number of bytes read from objects

• Type: counter

• Component: s3

• Key: total_read_bytes

scyllas3_total_write_bytes¶

Total number of bytes written to objects

• Type: counter

• Component: s3

• Key: total_write_bytes

scyllas3_total_read_latency_sec¶

Total time spent reading data from objects

• Type: counter

• Component: s3

• Key: total_read_latency_sec

scyllas3_total_write_latency_sec¶

Total time spend writing data to objects

• Type: counter

• Component: s3

• Key: total_write_latency_sec

Describe statement¶

Manager¶

scyllagroup_name_size_of_hints_in_progress¶

Size of hinted mutations that are scheduled to be written.

• Type: gauge

• Component: group_name

• Key: size_of_hints_in_progress

scyllagroup_name_written¶

Number of successfully written hints.

• Type: counter

• Component: group_name

• Key: written

scyllagroup_name_errors¶

Number of errors during hints writes.

• Type: counter

• Component: group_name

• Key: errors

scyllagroup_name_dropped¶

Number of dropped hints.

• Type: counter

• Component: group_name

• Key: dropped

scyllagroup_name_sent_total¶

Number of sent hints.

• Type: counter

• Component: group_name

• Key: sent_total

scyllagroup_name_sent_bytes_total¶

The total size of the sent hints (in bytes)

• Type: counter

• Component: group_name

• Key: sent_bytes_total

scyllagroup_name_discarded¶

Number of hints that were discarded during sending (too old, schema changed, etc.).

• Type: counter

• Component: group_name

• Key: discarded

scyllagroup_name_send_errors¶

Number of unexpected errors during sending, sending will be retried later

• Type: counter

• Component: group_name

• Key: send_errors

scyllagroup_name_corrupted_files¶

Number of hints files that were discarded during sending because the file was corrupted.

• Type: counter

• Component: group_name

• Key: corrupted_files

scyllagroup_name_pending_drains¶

Number of tasks waiting in the queue for draining hints

• Type: gauge

• Component: group_name

• Key: pending_drains

scyllagroup_name_pending_sends¶

Number of tasks waiting in the queue for sending a hint

• Type: gauge

• Component: group_name

• Key: pending_sends

Stream session¶

Trace keyspace helper¶

scyllatracing_keyspace_helper_tracing_errors¶

Counts a number of errors during writing to a system_traces keyspace. One error may cause one or more tracing records to be lost.

• Type: counter

• Component: tracing_keyspace_helper

• Key: tracing_errors

scyllatracing_keyspace_helper_bad_column_family_errors¶

Counts a number of times write failed due to one of the tables in the system_traces keyspace has an incompatible schema. One error may result one or more tracing records to be lost. Non-zero value indicates that the administrator has to take immediate steps to fix the corresponding schema. The appropriate error message will be printed in the syslog.

• Type: counter

• Component: tracing_keyspace_helper

• Key: bad_column_family_errors

Raft group0¶

scyllaraft_group0_status¶

status of the raft group, 1 - normal, 2 - aborted

• Type: gauge

• Component: raft_group0

• Key: status

Compress¶

scyllasstable_compression_dicts_total_live_memory_bytes¶

Total amount of memory consumed by SSTable compression dictionaries in RAM

• Type: counter

• Component: sstable_compression_dicts

• Key: total_live_memory_bytes

Main¶

scyllascylladb_current_version¶

Current ScyllaDB version.

• Type: gauge

• Component: scylladb

• Key: current_version

Rate limiter¶

scyllaper_partition_rate_limiter_allocations¶

Number of times a entry was allocated over an empty/expired entry.

• Type: counter

• Component: per_partition_rate_limiter

• Key: allocations

scyllaper_partition_rate_limiter_successful_lookups¶

Number of times a lookup returned an already allocated entry.

• Type: counter

• Component: per_partition_rate_limiter

• Key: successful_lookups

scyllaper_partition_rate_limiter_failed_allocations¶

Number of times the rate limiter gave up trying to allocate.

• Type: counter

• Component: per_partition_rate_limiter

• Key: failed_allocations

scyllaper_partition_rate_limiter_probe_count¶

Number of probes made during lookups.

• Type: counter

• Component: per_partition_rate_limiter

• Key: probe_count

scyllaper_partition_rate_limiter_load_factor¶

Current load factor of the hash table (upper bound, may be overestimated).

• Type: gauge

• Component: per_partition_rate_limiter

• Key: load_factor

Server¶

scyllaraft_add_entries¶

Number of entries added on this node, the log_entry_type label can be command, dummy or config

• Type: total_operations

• Component: raft

• Key: add_entries

scyllaraft_messages_received¶

Number of messages received, the message_type determines the type of message

• Type: total_operations

• Component: raft

• Key: messages_received

scyllaraft_messages_sent¶

Number of messages sent, the message_type determines the type of message

• Type: total_operations

• Component: raft

• Key: messages_sent

scyllaraft_waiter_awoken¶

Number of waiters that got result back

• Type: total_operations

• Component: raft

• Key: waiter_awoken

scyllaraft_waiter_dropped¶

Number of waiters that did not get result back

• Type: total_operations

• Component: raft

• Key: waiter_dropped

scyllaraft_polls¶

Number of times raft state machine polled

• Type: total_operations

• Component: raft

• Key: polls

scyllaraft_store_term_and_vote¶

Number of times term and vote persisted

• Type: total_operations

• Component: raft

• Key: store_term_and_vote

scyllaraft_store_snapshot¶

Number of snapshots persisted

• Type: total_operations

• Component: raft

• Key: store_snapshot

scyllaraft_sm_load_snapshot¶

Number of times user state machine reloaded with a snapshot

• Type: total_operations

• Component: raft

• Key: sm_load_snapshot

scyllaraft_truncate_persisted_log¶

Number of times log truncated on storage

• Type: total_operations

• Component: raft

• Key: truncate_persisted_log

scyllaraft_persisted_log_entries¶

Number of log entries persisted

• Type: total_operations

• Component: raft

• Key: persisted_log_entries

scyllaraft_queue_entries_for_apply¶

Number of log entries queued to be applied

• Type: total_operations

• Component: raft

• Key: queue_entries_for_apply

scyllaraft_applied_entries¶

Number of log entries applied

• Type: total_operations

• Component: raft

• Key: applied_entries

scyllaraft_snapshots_taken¶

Number of times user’s state machine snapshotted

• Type: total_operations

• Component: raft

• Key: snapshots_taken

scyllaraft_in_memory_log_size¶

size of in-memory part of the log

• Type: gauge

• Component: raft

• Key: in_memory_log_size

scyllaraft_log_memory_usage¶

memory usage of in-memory part of the log in bytes

• Type: gauge

• Component: raft

• Key: log_memory_usage

scyllaraft_log_last_index¶

term of the last log entry

• Type: gauge

• Component: raft

• Key: log_last_index

scyllaraft_log_last_term¶

index of the last log entry

• Type: gauge

• Component: raft

• Key: log_last_term

scyllaraft_snapshot_last_index¶

term of the snapshot

• Type: gauge

• Component: raft

• Key: snapshot_last_index

scyllaraft_snapshot_last_term¶

index of the snapshot

• Type: gauge

• Component: raft

• Key: snapshot_last_term

scyllaraft_state¶

current state: 0 - follower, 1 - candidate, 2 - leader

• Type: gauge

• Component: raft

• Key: state

scyllaraft_commit_index¶

commit index

• Type: gauge

• Component: raft

• Key: commit_index

scyllaraft_apply_index¶

applied index

• Type: gauge

• Component: raft

• Key: apply_index

Service¶

Stats¶

scyllaalternator_operation¶

number of operations via Alternator API

• Type: total_operations

• Component: alternator

• Key: operation

scyllaalternator_op_latency¶

Latency histogram of an operation via Alternator API

• Type: histogram

• Component: alternator

• Key: op_latency

scyllaalternator_op_latency_summary¶

Latency summary of an operation via Alternator API

• Type: summary

• Component: alternator

• Key: op_latency_summary

scyllaalternator_unsupported_operations¶

number of unsupported operations via Alternator API

• Type: total_operations

• Component: alternator

• Key: unsupported_operations

scyllaalternator_total_operations¶

number of total operations via Alternator API

• Type: total_operations

• Component: alternator

• Key: total_operations

scyllaalternator_reads_before_write¶

number of performed read-before-write operations

• Type: total_operations

• Component: alternator

• Key: reads_before_write

scyllaalternator_write_using_lwt¶

number of writes that used LWT

• Type: total_operations

• Component: alternator

• Key: write_using_lwt

scyllaalternator_shard_bounce_for_lwt¶

number writes that had to be bounced from this shard because of LWT requirements

• Type: total_operations

• Component: alternator

• Key: shard_bounce_for_lwt

scyllaalternator_requests_blocked_memory¶

Counts a number of requests blocked due to memory pressure.

• Type: total_operations

• Component: alternator

• Key: requests_blocked_memory

scyllaalternator_requests_shed¶

Counts a number of requests shed due to overload.

• Type: total_operations

• Component: alternator

• Key: requests_shed

scyllaalternator_filtered_rows_read_total¶

number of rows read during filtering operations

• Type: total_operations

• Component: alternator

• Key: filtered_rows_read_total

scyllaalternator_filtered_rows_matched_total¶

number of rows read and matched during filtering operations

• Type: total_operations

• Component: alternator

• Key: filtered_rows_matched_total

scyllaalternator_rcu_total¶

total number of consumed read units

• Type: counter

• Component: alternator

• Key: rcu_total

scyllaalternator_wcu_total¶

total number of consumed write units

• Type: counter

• Component: alternator

• Key: wcu_total

scyllaalternator_filtered_rows_dropped_total¶

number of rows read and dropped during filtering operations

• Type: total_operations

• Component: alternator

• Key: filtered_rows_dropped_total

scyllaalternator_batch_item_count¶

The total number of items processed across all batches

• Type: counter

• Component: alternator

• Key: batch_item_count

scyllaalternator_batch_item_count_histogram¶

Histogram of the number of items in a batch request

• Type: histogram

• Component: alternator

• Key: batch_item_count_histogram

Sstables¶

scyllasstables_index_page_cache_hits¶

Index page cache requests which were served from cache

• Type: counter

• Component: sstables

• Key: index_page_cache_hits

scyllasstables_index_page_cache_misses¶

Index page cache requests which had to perform I/O

• Type: counter

• Component: sstables

• Key: index_page_cache_misses

scyllasstables_index_page_cache_evictions¶

Total number of index page cache pages which have been evicted

• Type: counter

• Component: sstables

• Key: index_page_cache_evictions

scyllasstables_index_page_cache_populations¶

Total number of index page cache pages which were inserted into the cache

• Type: counter

• Component: sstables

• Key: index_page_cache_populations

scyllasstables_index_page_cache_bytes¶

Total number of bytes cached in the index page cache

• Type: gauge

• Component: sstables

• Key: index_page_cache_bytes

scyllasstables_index_page_cache_bytes_in_std¶

Total number of bytes in temporary buffers which live in the std allocator

• Type: gauge

• Component: sstables

• Key: index_page_cache_bytes_in_std

scyllasstables_index_page_hits¶

Index page requests which could be satisfied without waiting

• Type: counter

• Component: sstables

• Key: index_page_hits

scyllasstables_index_page_misses¶

Index page requests which initiated a read from disk

• Type: counter

• Component: sstables

• Key: index_page_misses

scyllasstables_index_page_blocks¶

Index page requests which needed to wait due to page not being loaded yet

• Type: counter

• Component: sstables

• Key: index_page_blocks

scyllasstables_index_page_evictions¶

Index pages which got evicted from memory

• Type: counter

• Component: sstables

• Key: index_page_evictions

scyllasstables_index_page_populations¶

Index pages which got populated into memory

• Type: counter

• Component: sstables

• Key: index_page_populations

scyllasstables_index_page_used_bytes¶

Amount of bytes used by index pages in memory

• Type: gauge

• Component: sstables

• Key: index_page_used_bytes

scyllasstables_pi_cache_hits_l0¶

Number of requests for promoted index block in state l0 which didn’t have to go to the page cache

• Type: counter

• Component: sstables

• Key: pi_cache_hits_l0

scyllasstables_pi_cache_hits_l1¶

Number of requests for promoted index block in state l1 which didn’t have to go to the page cache

• Type: counter

• Component: sstables

• Key: pi_cache_hits_l1

scyllasstables_pi_cache_hits_l2¶

Number of requests for promoted index block in state l2 which didn’t have to go to the page cache

• Type: counter

• Component: sstables

• Key: pi_cache_hits_l2

scyllasstables_pi_cache_misses_l0¶

Number of requests for promoted index block in state l0 which had to go to the page cache

• Type: counter

• Component: sstables

• Key: pi_cache_misses_l0

scyllasstables_pi_cache_misses_l1¶

Number of requests for promoted index block in state l1 which had to go to the page cache

• Type: counter

• Component: sstables

• Key: pi_cache_misses_l1

scyllasstables_pi_cache_misses_l2¶

Number of requests for promoted index block in state l2 which had to go to the page cache

• Type: counter

• Component: sstables

• Key: pi_cache_misses_l2

scyllasstables_pi_cache_populations¶

Number of promoted index blocks which got inserted

• Type: counter

• Component: sstables

• Key: pi_cache_populations

scyllasstables_pi_cache_evictions¶

Number of promoted index blocks which got evicted

• Type: counter

• Component: sstables

• Key: pi_cache_evictions

scyllasstables_pi_cache_bytes¶

Number of bytes currently used by cached promoted index blocks

• Type: gauge

• Component: sstables

• Key: pi_cache_bytes

scyllasstables_pi_cache_block_count¶

Number of promoted index blocks currently cached

• Type: gauge

• Component: sstables

• Key: pi_cache_block_count

scyllasstables_partition_writes¶

Number of partitions written

• Type: counter

• Component: sstables

• Key: partition_writes

scyllasstables_static_row_writes¶

Number of static rows written

• Type: counter

• Component: sstables

• Key: static_row_writes

scyllasstables_row_writes¶

Number of clustering rows written

• Type: counter

• Component: sstables

• Key: row_writes

scyllasstables_cell_writes¶

Number of cells written

• Type: counter

• Component: sstables

• Key: cell_writes

scyllasstables_tombstone_writes¶

Number of tombstones written

• Type: counter

• Component: sstables

• Key: tombstone_writes

scyllasstables_range_tombstone_writes¶

Number of range tombstones written

• Type: counter

• Component: sstables

• Key: range_tombstone_writes

scyllasstables_pi_auto_scale_events¶

Number of promoted index auto-scaling events

• Type: counter

• Component: sstables

• Key: pi_auto_scale_events

scyllasstables_range_tombstone_reads¶

Number of range tombstones read

• Type: counter

• Component: sstables

• Key: range_tombstone_reads

scyllasstables_row_tombstone_reads¶

Number of row tombstones read

• Type: counter

• Component: sstables

• Key: row_tombstone_reads

scyllasstables_cell_tombstone_writes¶

Number of cell tombstones written

• Type: counter

• Component: sstables

• Key: cell_tombstone_writes

scyllasstables_single_partition_reads¶

Number of single partition flat mutation reads

• Type: counter

• Component: sstables

• Key: single_partition_reads

scyllasstables_range_partition_reads¶

Number of partition range flat mutation reads

• Type: counter

• Component: sstables

• Key: range_partition_reads

scyllasstables_partition_reads¶

Number of partitions read

• Type: counter

• Component: sstables

• Key: partition_reads

scyllasstables_partition_seeks¶

Number of partitions seeked

• Type: counter

• Component: sstables

• Key: partition_seeks

scyllasstables_row_reads¶

Number of rows read

• Type: counter

• Component: sstables

• Key: row_reads

scyllasstables_capped_local_deletion_time¶

Number of SStables with tombstones whose local deletion time was capped at the maximum allowed value in Statistics

• Type: counter

• Component: sstables

• Key: capped_local_deletion_time

scyllasstables_capped_tombstone_deletion_time¶

Number of tombstones whose local deletion time was capped at the maximum allowed value

• Type: counter

• Component: sstables

• Key: capped_tombstone_deletion_time

scyllasstables_total_open_for_reading¶

Counter of sstables open for reading

• Type: counter

• Component: sstables

• Key: total_open_for_reading

scyllasstables_total_open_for_writing¶

Counter of sstables open for writing

• Type: counter

• Component: sstables

• Key: total_open_for_writing

scyllasstables_currently_open_for_reading¶

Number of sstables currently open for reading

• Type: gauge

• Component: sstables

• Key: currently_open_for_reading

scyllasstables_currently_open_for_writing¶

Number of sstables currently open for writing

• Type: gauge

• Component: sstables

• Key: currently_open_for_writing

scyllasstables_total_deleted¶

Counter of deleted sstables

• Type: counter

• Component: sstables

• Key: total_deleted

scyllasstables_bloom_filter_memory_size¶

Bloom filter memory usage in bytes.

• Type: gauge

• Component: sstables

• Key: bloom_filter_memory_size

Reader concurrency semaphore¶

scylladatabase_sstable_read_queue_overloads¶

Counts the number of times the sstable read queue was overloaded. A non-zero value indicates that we have to drop read requests because they arrive faster than we can serve them.

• Type: counter

• Component: database

• Key: sstable_read_queue_overloads

scylladatabase_active_reads¶

Holds the number of currently active read operations.

• Type: gauge

• Component: database

• Key: active_reads

scylladatabase_reads_memory_consumption¶

Holds the amount of memory consumed by current read operations.

• Type: gauge

• Component: database

• Key: reads_memory_consumption

scylladatabase_queued_reads¶

Holds the number of currently queued read operations.

• Type: gauge

• Component: database

• Key: queued_reads

scylladatabase_paused_reads¶

The number of currently active reads that are temporarily paused.

• Type: gauge

• Component: database

• Key: paused_reads

scylladatabase_paused_reads_permit_based_evictions¶

The number of paused reads evicted to free up permits. Permits are required for new reads to start, and the database will evict paused reads (if any) to be able to admit new ones, if there is a shortage of permits.

• Type: counter

• Component: database

• Key: paused_reads_permit_based_evictions

scylladatabase_reads_shed_due_to_overload¶

The number of reads shed because the admission queue reached its max capacity. When the queue is full, excessive reads are shed to avoid overload.

• Type: counter

• Component: database

• Key: reads_shed_due_to_overload

scylladatabase_disk_reads¶

Holds the number of currently active disk read operations.

• Type: gauge

• Component: database

• Key: disk_reads

scylladatabase_sstables_read¶

Holds the number of currently read sstables.

• Type: gauge

• Component: database

• Key: sstables_read

scylladatabase_total_reads¶

Counts the total number of successful user reads on this shard.

• Type: counter

• Component: database

• Key: total_reads

scylladatabase_total_reads_failed¶

Counts the total number of failed user read operations. Add the total_reads to this value to get the total amount of reads issued on this shard.

• Type: counter

• Component: database

• Key: total_reads_failed

Wasm instance cache¶

scyllauser_functions_cache_hits¶

The number of user defined function cache hits

• Type: counter

• Component: user_functions

• Key: cache_hits

scyllauser_functions_cache_misses¶

The number of user defined functions loaded

• Type: counter

• Component: user_functions

• Key: cache_misses

scyllauser_functions_cache_blocks¶

The number of times a user defined function waited for an instance

• Type: counter

• Component: user_functions

• Key: cache_blocks

scyllauser_functions_cache_instace_count_any¶

The total number of cached wasm instances, instances in use and empty instances

• Type: gauge

• Component: user_functions

• Key: cache_instace_count_any

scyllauser_functions_cache_total_size¶

The total size of instances stored in the user defined function cache

• Type: gauge

• Component: user_functions

• Key: cache_total_size

Standard role manager¶

Tablet allocator¶

scyllagroup_name_calls¶

number of calls to the load balancer

• Type: counter

• Component: group_name

• Key: calls

scyllagroup_name_migrations_produced¶

number of migrations produced by the load balancer

• Type: counter

• Component: group_name

• Key: migrations_produced

scyllagroup_name_migrations_skipped¶

number of migrations skipped by the load balancer due to load limits

• Type: counter

• Component: group_name

• Key: migrations_skipped

scyllagroup_name_cross_rack_collocations¶

number of co-locating migrations which move replica across racks

• Type: counter

• Component: group_name

• Key: cross_rack_collocations

scyllagroup_name_load¶

node load during last load balancing

• Type: gauge

• Component: group_name

• Key: load

scyllagroup_name_resizes_emitted¶

number of resizes produced by the load balancer

• Type: counter

• Component: group_name

• Key: resizes_emitted

scyllagroup_name_resizes_revoked¶

number of resizes revoked by the load balancer

• Type: counter

• Component: group_name

• Key: resizes_revoked

scyllagroup_name_resizes_finalized¶

number of resizes finalized by the load balancer

• Type: counter

• Component: group_name

• Key: resizes_finalized

Ttl¶

scyllaexpiration_scan_passes¶

number of passes over the database

• Type: total_operations

• Component: expiration

• Key: scan_passes

scyllaexpiration_scan_table¶

number of table scans (counting each scan of each table that enabled expiration)

• Type: total_operations

• Component: expiration

• Key: scan_table

scyllaexpiration_items_deleted¶

number of items deleted after expiration

• Type: total_operations

• Component: expiration

• Key: items_deleted

scyllaexpiration_secondary_ranges_scanned¶

number of token ranges scanned by this node while their primary owner was down

• Type: total_operations

• Component: expiration

• Key: secondary_ranges_scanned