Shard metrics

Documents the shard metrics used with Redis Enterprise Software REST API calls.

Metric name Type Description
aof_rewrite_inprog float The number of simultaneous AOF rewrites that are in progress
avg_ttl float Estimated average time to live of a random key (msec)
big_del_flash float Rate of key deletes for keys on flash (BigRedis) (key access/sec). Only returned when BigRedis is enabled.
big_del_ram float Rate of key deletes for keys in RAM (BigRedis) (key access/sec); this includes write misses (new keys created). Only returned when BigRedis is enabled.
big_fetch_flash float Rate of key reads/updates for keys on flash (BigRedis) (key access/sec). Only returned when BigRedis is enabled.
big_fetch_ram float Rate of key reads/updates for keys in RAM (BigRedis) (key access/sec). Only returned when BigRedis is enabled.
big_io_ratio_flash float Rate of key operations on flash. Can be used to compute the ratio of I/O operations (key access/sec). Only returned when BigRedis is enabled.
big_io_ratio_redis float Rate of Redis operations on keys. Can be used to compute the ratio of I/O operations) (key access/sec). Only returned when BigRedis is enabled.
big_write_flash float Rate of key writes for keys on flash (BigRedis) (key access/sec). Only returned when BigRedis is enabled.
big_write_ram float Rate of key writes for keys in RAM (BigRedis) (key access/sec); this includes write misses (new keys created). Only returned when BigRedis is enabled.
bigstore_io_dels float Rate of key deletions from flash (key access/sec). Only returned when BigRedis is enabled.
bigstore_io_read_bytes float Throughput of I/O read operations against backend flash for all shards of the DB (BigRedis) (bytes/sec). Only returned when BigRedis is enabled.
bigstore_io_reads float Rate of key reads from flash (key access/sec). Only returned when BigRedis is enabled.
bigstore_io_write_bytes float Throughput of I/O write operations against backend flash for all shards of the DB (BigRedis) (bytes/sec). Only returned when BigRedis is enabled.
bigstore_io_writes float Rate of key writes from flash (key access/sec). Only returned when BigRedis is enabled.
bigstore_iops float Rate of I/O operations against backend flash for all shards of the DB (BigRedis) (ops/sec). Only returned when BigRedis is enabled.
bigstore_kv_ops float Rate of value read/write/del operations against backend flash for all shards of the DB (BigRedis) (key access/sec). Only returned when BigRedis is enabled.
bigstore_objs_flash float Key count on flash (BigRedis). Only returned when BigRedis is enabled.
bigstore_objs_ram float Key count in RAM (BigRedis). Only returned when BigRedis is enabled.
bigstore_throughput float Throughput of I/O operations against backend flash for all shards of the DB (BigRedis) (bytes/sec). Only returned when BigRedis is enabled.
blocked_clients float Count the clients waiting on a blocking call
connected_clients float Number of client connections to the specific shard
disk_frag_ratio float Flash fragmentation ratio (used/required). Only returned when BigRedis is enabled.
evicted_objects float Rate of key evictions from DB (evictions/sec)
expired_objects float Rate keys expired in DB (expirations/sec)
fork_cpu_system float % cores utilization in system mode for the Redis shard fork child process
fork_cpu_user float % cores utilization in user mode for the Redis shard fork child process
last_save_time float Time of the last RDB save
main_thread_cpu_system float % cores utilization in system mode for the Redis shard main thread
main_thread_cpu_user float % cores utilization in user mode for the Redis shard main thread
mem_frag_ratio float RAM fragmentation ratio (RSS/allocated RAM)
mem_not_counted_for_evict float Portion of used_memory (in bytes) not counted for eviction and OOM errors
mem_size_lua float Redis Lua scripting heap size (bytes)
no_of_expires float Number of volatile keys on the shard
no_of_keys float Number of keys in DB
pubsub_channels float Count the pub/sub channels with subscribed clients
pubsub_patterns float Count the pub/sub patterns with subscribed clients
rdb_changes_since_last_save float Count changes since last RDB save
read_hits float Rate of read operations accessing an existing key (ops/sec)
read_misses float Rate of read operations accessing a nonexistent key (ops/sec)
shard_cpu_system float % cores utilization in system mode for the Redis shard process
shard_cpu_user float % cores utilization in user mode for the Redis shard process
total_req float Rate of operations on DB (ops/sec)
used_memory float Memory used by shard (in BigRedis this includes flash) (bytes)
used_memory_peak float The largest amount of memory used by this shard (bytes)
used_memory_rss float Resident set size of this shard (bytes)
write_hits float Rate of write operations accessing an existing key (ops/sec)
write_misses float Rate of write operations accessing a nonexistent key (ops/sec)
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