# Metrics for MemoryDB
<a name="metrics.memorydb"></a>

The `AWS/MemoryDB` namespace includes the following metrics.

With the exception of `ReplicationLag`, `EngineCPUUtilization`, `SuccessfulWriteRequestLatency`, and `SuccessfulReadRequestLatency`, these metrics are derived from the Valkey and Redis OSS **info** command. Each metric is calculated at the node level.

For complete documentation of the **INFO** command, see [INFO](http://valkey.io/commands/info). 

**See also:**
+ [Host-Level Metrics](metrics.HostLevel.md)

[\[See the AWS documentation website for more details\]](http://docs.aws.amazon.com/memorydb/latest/devguide/metrics.memorydb.html)

The following are aggregations of certain kinds of commands, derived from **info commandstats**. The commandstats section provides statistics based on the command type, including the number of calls.

For a full list of available commands, see [commands](https://valkey.io/commands). 


| Metric  | Description  | Unit  | 
| --- | --- | --- | 
| EvalBasedCmds | The total number of commands for eval-based commands. This is derived from the commandstats statistic by summing eval and evalsha. | Count | 
| GeoSpatialBasedCmds | The total number of commands for geospatial-based commands. This is derived from the commandstats statistic. It's derived by summing all of the geo type of commands: geoadd, geodist, geohash, geopos, georadius, and georadiusbymember. | Count | 
| GetTypeCmds | The total number of read-only type commands. This is derived from the commandstats statistic by summing all of the read-only type commands (get, hget, scard, lrange, and so on.) | Count | 
| HashBasedCmds | The total number of commands that are hash-based. This is derived from the commandstats statistic by summing all of the commands that act upon one or more hashes (hget, hkeys, hvals, hdel, and so on). | Count | 
| HyperLogLogBasedCmds | The total number of HyperLogLog-based commands. This is derived from the commandstats statistic by summing all of the pf type of commands (pfadd, pfcount, pfmerge, and so on.). | Count | 
|  JsonBasedCmds |  The total number of commands that are JSON-based. This is derived from the commandstats statistic by summing all of the commands that act upon one or more JSON document objects.  | Count | 
| KeyBasedCmds | The total number of commands that are key-based. This is derived from the commandstats statistic by summing all of the commands that act upon one or more keys across multiple data structures (del, expire, rename, and so on.). | Count | 
| ListBasedCmds | The total number of commands that are list-based. This is derived from the commandstats statistic by summing all of the commands that act upon one or more lists (lindex, lrange, lpush, ltrim, and so on). | Count | 
| PubSubBasedCmds | The total number of commands for pub/sub functionality. This is derived from the commandstats statistics by summing all of the commands used for pub/sub functionality: psubscribe, publish, pubsub, punsubscribe, subscribe, and unsubscribe. | Count | 
| SearchBasedCmds | The total number of secondary index and search commands, including both read and write commands. This is derived from the commandstats statistic by summing all search commands that act upon secondary indexes. | Count | 
| SearchBasedGetCmds | Total number of secondary index and search read-only commands. This is derived from the commandstats statistic by summing all secondary index and search get commands. | Count | 
| SearchBasedSetCmds | Total number of secondary index and search write commands. This is derived from the commandstats statistic by summing all secondary index and search set commands. | Count | 
| SearchNumberOfIndexes | Total number of indexes.  | Count | 
| SearchNumberOfIndexedKeys | Total number of indexed keys  | Count | 
| SearchTotalIndexSize | Memory (bytes) used by all the indexes.  | Bytes | 
| SetBasedCmds | The total number of commands that are set-based. This is derived from the commandstats statistic by summing all of the commands that act upon one or more sets (scard, sdiff, sadd, sunion, and so on). | Count | 
| SetTypeCmds | The total number of write types of commands. This is derived from the commandstats statistic by summing all of the mutative types of commands that operate on data (set, hset, sadd, lpop, and so on.) | Count | 
| SortedSetBasedCmds | The total number of commands that are sorted set-based. This is derived from the commandstats statistic by summing all of the commands that act upon one or more sorted sets (zcount, zrange, zrank, zadd, and so on). | Count | 
| StringBasedCmds | The total number of commands that are string-based. This is derived from the commandstats statistic by summing all of the commands that act upon one or more strings (strlen, setex, setrange, and so on). | Count | 
| StreamBasedCmds | The total number of commands that are stream-based. This is derived from the commandstats statistic by summing all of the commands that act upon one or more streams data types (xrange, xlen, xadd, xdel, and so on). | Count |