Metrics

Redis is an in-memory data structure store known for its speed and flexibility. Monitoring its metrics is essential to maintain performance, stability, and reliability.

Access metrics for Redis

To fetch the above listed metrics for Redis deployments in PDS, you can connect to the metrics exporter using the following details:

Metrics port

The data service metrics are accessible on port 9121 for both Redis deployments.

Access metrics

To access the metrics from outside the Kubernetes cluster:

1. Use the kubectl port-forward command to forward the metrics port (9121) to your local machine. For example:

   kubectl port-forward <redis-pod-name> 9121:9121 -n <namespace>

   Replace <redis-pod-name> with the name of your Redis pod and <namespace> with the appropriate namespace.

2. Once the port-forwarding is active, access the metrics by navigating to the following URL in your browser or API client:

   http://localhost:9121/metrics

note

Ensure that the metrics port is open and accessible within your cluster’s networking configuration.

Redis metrics

The following is a list of key Redis metrics in PDS. Understanding these metrics will help administrators optimize performance, troubleshoot issues, and ensure the Redis instance runs smoothly.

Metric Name	Metric Type
process_cpu_seconds_total	counter
process_max_fds	gauge
process_network_receive_bytes_total	counter
process_network_transmit_bytes_total	counter
process_open_fds	gauge
process_resident_memory_bytes	gauge
process_start_time_seconds	gauge
process_virtual_memory_max_bytes	gauge
process_virtual_memory_bytes	gauge
redis_active_defrag_running	gauge
redis_allocator_active_bytes	gauge
redis_allocator_allocated_bytes	gauge
redis_allocator_frag_bytes	gauge
redis_allocator_frag_ratio	gauge
redis_allocator_resident_bytes	gauge
redis_allocator_rss_bytes	gauge
redis_allocator_rss_ratio	gauge
redis_aof_current_rewrite_duration_sec	gauge
redis_aof_enabled	gauge
redis_aof_last_bgrewrite_status	gauge
redis_aof_last_cow_size_bytes	gauge
redis_aof_last_rewrite_duration_sec	gauge
redis_aof_last_write_status	gauge
redis_aof_rewrite_in_progress	gauge
redis_aof_rewrite_scheduled	gauge
redis_blocked_clients	gauge
redis_client_recent_max_input_buffer_bytes	gauge
redis_client_recent_max_output_buffer_bytes	gauge
redis_clients_in_timeout_table	gauge
redis_cluster_connections	gauge
redis_cluster_enabled	gauge
redis_commands_duration_seconds_total	counter
redis_commands_failed_calls_total	counter
redis_commands_latencies_usec	histogram
redis_commands_processed_total	counter
redis_commands_rejected_calls_total	counter
redis_commands_total	counter
redis_config_client_output_buffer_limit_bytes	gauge
redis_config_client_output_buffer_limit_overcome_seconds	gauge
nds	gauge
redis_config_io_threads	gauge
redis_config_maxclients	gauge
redis_config_maxmemory	gauge
redis_connected_clients	gauge
redis_connected_slave_lag_seconds	gauge
redis_connected_slave_offset_bytes	gauge
redis_connected_slaves	gauge
redis_connections_received_total	counter
redis_cpu_sys_children_seconds_total	counter
redis_cpu_sys_main_thread_seconds_total	counter
redis_cpu_sys_seconds_total	counter
redis_cpu_user_children_seconds_total	counter
redis_cpu_user_main_thread_seconds_total	counter
redis_cpu_user_seconds_total	counter
redis_db_keys	gauge
redis_db_keys_expiring	gauge
redis_defrag_hits	gauge
redis_defrag_key_hits	gauge
redis_defrag_key_misses	gauge
redis_defrag_misses	gauge
redis_dump_payload_sanitizations	counter
redis_errors_total	counter
redis_evicted_keys_total	counter
redis_expired_keys_total	counter
redis_expired_stale_percentage	gauge
redis_expired_time_cap_reached_total	gauge
redis_exporter_build_info	gauge
redis_exporter_last_scrape_connect_time_seconds	gauge
redis_exporter_last_scrape_duration_seconds	gauge
redis_exporter_last_scrape_error	gauge
redis_exporter_scrape_duration_seconds	summary
redis_exporter_scrapes_total	counter
redis_instance_info	gauge
redis_io_threaded_reads_processed	counter
redis_io_threaded_writes_processed	counter
redis_io_threads_active	gauge
redis_keyspace_hits_total	counter
redis_keyspace_misses_total	counter
redis_last_key_groups_scrape_duration_milliseconds	gauge
redis_last_slow_execution_duration_seconds	gauge
redis_latency_percentiles_usec	summary
redis_latest_fork_seconds	gauge
redis_lazyfree_pending_objects	gauge
redis_loading_dump_file	gauge
redis_master_repl_offset	gauge
redis_mem_clients_normal	gauge
redis_mem_clients_slaves	gauge
redis_mem_fragmentation_bytes	gauge
redis_mem_fragmentation_ratio	gauge
redis_mem_not_counted_for_eviction_bytes	gauge
redis_mem_total_replication_buffers_bytes	gauge
redis_memory_max_bytes	gauge
redis_memory_used_bytes	gauge
redis_memory_used_dataset_bytes	gauge
redis_memory_used_lua_bytes	gauge
redis_memory_used_overhead_bytes	gauge
redis_memory_used_peak_bytes	gauge
redis_memory_used_rss_bytes	gauge
redis_memory_used_scripts_bytes	gauge
redis_memory_used_startup_bytes	gauge
redis_migrate_cached_sockets_total	gauge
redis_module_fork_in_progress	gauge
redis_module_fork_last_cow_size	gauge
redis_net_input_bytes_total	counter
redis_net_output_bytes_total	counter
redis_number_of_cached_scripts	gauge
redis_process_id	gauge
redis_pubsub_channels	gauge
redis_pubsub_patterns	gauge
redis_pubsubshard_channels	gauge
redis_rdb_bgsave_in_progress	gauge
redis_rdb_changes_since_last_save	gauge
redis_rdb_current_bgsave_duration_sec	gauge
redis_rdb_last_bgsave_duration_sec	gauge
redis_rdb_last_bgsave_status	gauge
redis_rdb_last_cow_size_bytes	gauge
redis_rdb_last_load_expired_keys	gauge
redis_rdb_last_load_loaded_keys	gauge
redis_rdb_last_save_timestamp_seconds	gauge
redis_rdb_saves_total	gauge
redis_rejected_connections_total	counter
redis_repl_backlog_first_byte_offset	gauge
redis_repl_backlog_history_bytes	gauge
redis_repl_backlog_is_active	gauge
redis_replica_partial_resync_accepted	gauge
redis_replica_partial_resync_denied	gauge
redis_replica_resyncs_full	gauge
redis_replication_backlog_bytes	gauge
redis_second_repl_offset	gauge
redis_slave_expires_tracked_keys	gauge
redis_slowlog_last_id	gauge
redis_slowlog_length	gauge
redis_start_time_seconds	gauge
redis_target_scrape_request_errors_total	counter
redis_total_error_replies	counter
redis_total_reads_processed	counter
redis_total_writes_processed	counter
redis_tracking_clients	gauge
redis_tracking_total_items	gauge
redis_tracking_total_keys	gauge
redis_tracking_total_prefixes	gauge
redis_unexpected_error_replies	counter
redis_up	gauge
redis_uptime_in_seconds	gauge