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ScyllaDB Enterprise Metric Update - ScyllaDB Enterprise 2024.1 to 2024.2¶

ScyllaDB Enterprise 2024.2 Dashboards are available as part of the latest Scylla Monitoring Stack.

New Metrics¶

The following metrics are new in ScyllaDB Enterprise 2024.2 compared to 2024.1:

Metric	Description
scylla_cql_replication_strategy_fail_list_violations	Counts the number of replication_strategy_fail_list guardrail violations, i.e. attempts to set a forbidden replication strategy in a keyspace via CREATE/ALTER KEYSPACE.
scylla_cql_replication_strategy_warn_list_violations	Counts the number of replication_strategy_warn_list guardrail violations, i.e. attempts to set a discouraged replication strategy in a keyspace via CREATE/ALTER KEYSPACE.
scylla_reactor_fstream_read_bytes	Counts bytes read from disk file streams. A high rate indicates high disk activity. Divide by fstream_reads to determine the average read size.
scylla_reactor_fstream_read_bytes_blocked	Counts the number of bytes read from disk that could not be satisfied from read-ahead buffers and had to block. Indicates short streams or incorrect read ahead configuration.
scylla_reactor_fstream_reads	Counts reads from disk file streams. A high rate indicates high disk activity. Contrast with other fstream_read* counters to locate bottlenecks.
scylla_reactor_fstream_reads_ahead_bytes_discarded	Counts the number of buffered bytes that were read ahead of time and were discarded because they were not needed, wasting disk bandwidth. Indicates over-eager read ahead configuration.
scylla_reactor_fstream_reads_aheads_discarded	Counts the number of times a buffer that was read ahead of time and was discarded because it was not needed, wasting disk bandwidth. Indicates over-eager read ahead configuration.
scylla_reactor_fstream_reads_blocked	Counts the number of times a disk read could not be satisfied from read-ahead buffers, and had to block. Indicates short streams or incorrect read ahead configuration.
scylla_rpc_client_count	Total number of clients.
scylla_rpc_client_exception_received	Total number of exceptional responses received.
scylla_rpc_client_pending	Number of queued outbound messages.
scylla_rpc_client_replied	Total number of responses received.
scylla_rpc_client_sent_messages	Total number of messages sent.
scylla_rpc_client_timeout	Total number of timeout responses.
scylla_rpc_client_wait_reply	Number of replies awaited.
scylla_storage_proxy_coordinator_mv_flow_control_delay_total	Total delay (in microseconds) added for MV flow control to delay the response sent to finished writes. Divide it by throttled_base_writes_total to find the average delay.
scylla_storage_proxy_coordinator_throttled_base_writes_total	Number of throttled base replica write requests, a throttled write is one whose response was delayed; see mv_flow_control_delay_total.

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