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ScyllaDB Metric Update - Scylla 5.2 to 5.4¶

Scylla 5.4 Dashboards are available as part of the latest Scylla Monitoring Stack.

The following metrics are new in ScyllaDB 5.4¶

Metric	Description
scylla_cache_rows_compacted	Total amount of attempts to compact expired rows during read.
scylla_cache_rows_compacted_away	Total amount of compacted and removed rows during read.
scylla_cql_authorized_prepared_statements_privileged_entries_evictions_on_size	Counts the number of evictions of prepared statements from the authorized prepared statements cache after they have been used more than once.
scylla_cql_maximum_replication_factor_fail_violations	Counts the number of maximum_replication_factor_fail_threshold guardrail violations, i.e., attempts to create a keyspace with RF on one of the DCs above the set guardrail.
scylla_cql_maximum_replication_factor_warn_violations	Counts the number of maximum_replication_factor_warn_threshold guardrail violations, i.e., attempts to create a keyspace with RF on one of the DCs above the set guardrail.
scylla_cql_minimum_replication_factor_fail_violations	Counts the number of minimum_replication_factor_fail_threshold guardrail violations, i.e., attempts to create a keyspace with RF on one of the DCs below the set guardrail.
scylla_cql_minimum_replication_factor_warn_violations	Counts the number of minimum_replication_factor_warn_threshold guardrail violations, i.e., attempts to create a keyspace with RF on one of the DCs below the set guardrail.
scylla_hints_for_views_manager_send_errors	Number of unexpected errors during sending. Sending will be retried later.
scylla_hints_manager_send_errors	Number of unexpected errors during sending. Sending will be retried later.
scylla_reactor_stalls	A histogram of reactor stall durations.
scylla_storage_proxy_coordinator_background_read_repairs	Number of background read repairs.
scylla_storage_proxy_coordinator_background_writes_failed	Number of write requests that failed after CL was reached.
scylla_storage_proxy_coordinator_canceled_read_repairs	Number of global read repairs canceled due to a concurrent write.
scylla_storage_proxy_coordinator_cas_dropped_prune	How many times a coordinator did not perform prune after cas.
scylla_storage_proxy_coordinator_cas_failed_read_round_optimization	CAS read rounds issued only if the previous value is missing on some replica.
scylla_storage_proxy_coordinator_cas_read_contention	How many contended reads were encountered.
scylla_storage_proxy_coordinator_cas_read_latency	Transactional read latency histogram.
scylla_storage_proxy_coordinator_cas_read_latency_summary	CAS read latency summary.
scylla_storage_proxy_coordinator_cas_read_timeouts	Number of transactional read requests failed due to a timeout.
scylla_storage_proxy_coordinator_cas_read_unavailable	Number of transactional read requests failed due to an “unavailable” error.
scylla_storage_proxy_coordinator_cas_read_unfinished_commit	Number of transaction commit attempts that occurred on read.
scylla_storage_proxy_coordinator_cas_total_operations	Number of total paxos operations executed (reads and writes).
scylla_storage_proxy_coordinator_cas_write_condition_not_met	Number of transaction preconditions that did not match current values.
scylla_storage_proxy_coordinator_cas_write_contention	How many contended writes were encountered.
scylla_storage_proxy_coordinator_cas_write_latency	Transactional write latency histogram.
scylla_storage_proxy_coordinator_cas_write_latency_summary	CAS write latency summary.
scylla_storage_proxy_coordinator_cas_write_timeout_due_to_uncertainty	How many times write timeout was reported because of uncertainty in the result.
scylla_storage_proxy_coordinator_cas_write_timeouts	Number of transactional write requests failed due to a timeout.
scylla_storage_proxy_coordinator_cas_write_unavailable	Number of transactional write requests failed due to an “unavailable” error.
scylla_storage_proxy_coordinator_cas_write_unfinished_commit	Number of transaction commit attempts that occurred on write.
scylla_storage_proxy_coordinator_foreground_read_repairs	Number of foreground read repairs.
scylla_storage_proxy_coordinator_range_timeouts	Number of range read operations failed due to a timeout.
scylla_storage_proxy_coordinator_range_unavailable	Number of range read operations failed due to an “unavailable” error.
scylla_storage_proxy_coordinator_read_rate_limited	Number of read requests that were rejected by replicas because the rate limit for the partition was reached.
scylla_storage_proxy_coordinator_read_retries	Number of read retry attempts.
scylla_storage_proxy_coordinator_read_timeouts	Number of read request failed due to a timeout.
scylla_storage_proxy_coordinator_read_unavailable	Number read requests failed due to an “unavailable” error.
scylla_storage_proxy_coordinator_reads_coordinator_outside_replica_set	Number of CQL read requests which arrived to a non-replica and had to be forwarded to a replica.
scylla_storage_proxy_coordinator_speculative_data_reads	Number of speculative data read requests that were sent.
scylla_storage_proxy_coordinator_speculative_digest_reads	Number of speculative digest read requests that were sent.
scylla_storage_proxy_coordinator_throttled_writes	Number of throttled write requests.
scylla_storage_proxy_coordinator_write_rate_limited	Number of write requests which were rejected by replicas because rate limit for the partition was reached.
scylla_storage_proxy_coordinator_write_timeouts	Number of write requests failed due to a timeout.
scylla_storage_proxy_coordinator_write_unavailable	Number of write requests failed due to an “unavailable” error.
scylla_storage_proxy_coordinator_writes_coordinator_outside_replica_set	Number of CQL write requests that arrived to a non-replica and had to be forwarded to a replica.
scylla_storage_proxy_coordinator_writes_failed_due_to_too_many_in_flight_hints	Number of CQL write requests that failed because the hinted handoff mechanism is overloaded and cannot store any more in-flight hints.
scylla_storage_proxy_replica_cas_dropped_prune	How many times a coordinator did not perform prune after cas.
scylla_storage_proxy_replica_cross_shard_ops	Number of operations that crossed a shard boundary.
scylla_storage_proxy_replica_forwarded_mutations	Number of mutations forwarded to other replica nodes.
scylla_storage_proxy_replica_forwarding_errors	Number of errors during forwarding mutations to other replica nodes.
scylla_storage_proxy_replica_reads	Number of remote data read requests this node received.
scylla_storage_proxy_replica_received_counter_updates	Number of counter updates received by this node acting as an update leader.
scylla_storage_proxy_replica_received_mutations	Number of mutations received by a replica node.
scylla_transport_cql_request_bytes	Counts the total number of received bytes in CQL messages of a specific kind.
scylla_transport_cql_requests_count	Counts the total number of CQL messages of a specific kind.
scylla_transport_cql_response_bytes	Counts the total number of sent response bytes for CQL requests of a specific kind.

The following metrics are replaced in ScyllaDB 5.4¶

scylla_transport_auth_responses
scylla_transport_batch_requests
scylla_transport_execute_requests
scylla_transport_options_requests
scylla_transport_prepare_requests
scylla_transport_query_requests
scylla_transport_register_requests
scylla_transport_startups

The above metrics are grouped under the single metric scylla_transport_cql_requests_count``metric with the ``kind label to differentiate between them.

Additional details about them are provided by the scylla_transport_cql_request_bytes and scylla_transport_cql_response_bytes metrics.

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