MEMORY STATS
@slow,
The MEMORY STATS command returns an Array reply about the memory usage of the
server.
The information about memory usage is provided as metrics and their respective values. The following metrics are reported:
peak.allocated: Peak memory consumed by Redis in bytes (see INFO's
used_memory_peak)total.allocated: Total number of bytes allocated by Redis using its
allocator (see INFO's used_memory)startup.allocated: Initial amount of memory consumed by Redis at startup
in bytes (see INFO's used_memory_startup)replication.backlog: Size in bytes of the replication backlog (see
INFO's repl_backlog_active)clients.slaves: The total size in bytes of all replicas overheads (output
and query buffers, connection contexts)clients.normal: The total size in bytes of all clients overheads (output
and query buffers, connection contexts)cluster.links: Memory usage by cluster links (Added in Redis 7.0, see INFO's mem_cluster_links).aof.buffer: The summed size in bytes of AOF related buffers.lua.caches: the summed size in bytes of the overheads of the Lua scripts'
cachesfunctions.caches: the summed size in bytes of the overheads of the Function scripts'
cachesdbXXX: For each of the server's databases, the overheads of the main and
expiry dictionaries (overhead.hashtable.main and
overhead.hashtable.expires, respectively) are reported in bytesoverhead.db.hashtable.lut: Total overhead of dictionary buckets in databases (Added in Redis 7.4)overhead.db.hashtable.rehashing: Temporary memory overhead of database dictionaries currently being rehashed (Added in Redis 7.4)overhead.total: The sum of all overheads, i.e. startup.allocated,
replication.backlog, clients.slaves, clients.normal, aof.buffer and
those of the internal data structures that are used in managing the
Redis keyspace (see INFO's used_memory_overhead)db.dict.rehashing.count: Number of DB dictionaries currently being rehashed (Added in Redis 7.4)keys.count: The total number of keys stored across all databases in the
serverkeys.bytes-per-key: The ratio between dataset.bytes and keys.countdataset.bytes: The size in bytes of the dataset, i.e. overhead.total
subtracted from total.allocated (see INFO's used_memory_dataset)dataset.percentage: The percentage of dataset.bytes out of the total
memory usagepeak.percentage: The percentage of total.allocated out of
peak.allocatedallocator.allocated: See INFO's allocator_allocatedallocator.active: See INFO's allocator_activeallocator.resident: See INFO's allocator_residentallocator.muzzy: See INFO's allocator_muzzyallocator-fragmentation.ratio: See INFO's allocator_frag_ratioallocator-fragmentation.bytes: See INFO's allocator_frag_bytesallocator-rss.ratio: See INFO's allocator_rss_ratioallocator-rss.bytes: See INFO's allocator_rss_bytesrss-overhead.ratio: See INFO's rss_overhead_ratiorss-overhead.bytes: See INFO's rss_overhead_bytesfragmentation: See INFO's mem_fragmentation_ratiofragmentation.bytes: See INFO's mem_fragmentation_bytesA note about the word slave used in this man page: Starting with Redis 5, if not for backward compatibility, the Redis project no longer uses the word slave. Unfortunately in this command the word slave is part of the protocol, so we'll be able to remove such occurrences only when this API will be naturally deprecated.