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> System table containing information useful for an overview of memory usage and ProfileEvents of users.

# system.user_processes

<Info>
  **Querying in ClickHouse Cloud**

  The data in this system table is held locally on each node in ClickHouse Cloud. Obtaining a complete view of all data, therefore, requires the `clusterAllReplicas` function. See [here](/reference/system-tables/overview#system-tables-in-clickhouse-cloud) for further details.
</Info>

<h2 id="description">
  Description
</h2>

This system table can be used to get overview of memory usage and ProfileEvents of users.

<h2 id="columns">
  Columns
</h2>

* `user` ([String](/reference/data-types)) — User name.
* `memory_usage` ([Int64](/reference/data-types)) — Sum of RAM used by all processes of the user. It might not include some types of dedicated memory. See the max\_memory\_usage setting.
* `peak_memory_usage` ([Int64](/reference/data-types)) — The peak of memory usage of the user. It can be reset when no queries are run for the user.
* `ProfileEvents` ([Map(LowCardinality(String), UInt64)](/reference/data-types)) — Summary of ProfileEvents that measure different metrics for the user. The description of them could be found in the table system.events

<h2 id="example">
  Example
</h2>

```sql theme={null}
SELECT * FROM system.user_processes LIMIT 10 FORMAT Vertical;
```

```response theme={null}
Row 1:
──────
user:              default
memory_usage:      9832
peak_memory_usage: 9832
ProfileEvents:     {'Query':5,'SelectQuery':5,'QueriesWithSubqueries':38,'SelectQueriesWithSubqueries':38,'QueryTimeMicroseconds':842048,'SelectQueryTimeMicroseconds':842048,'ReadBufferFromFileDescriptorRead':6,'ReadBufferFromFileDescriptorReadBytes':234,'IOBufferAllocs':3,'IOBufferAllocBytes':98493,'ArenaAllocChunks':283,'ArenaAllocBytes':1482752,'FunctionExecute':670,'TableFunctionExecute':16,'DiskReadElapsedMicroseconds':19,'NetworkSendElapsedMicroseconds':684,'NetworkSendBytes':139498,'SelectedRows':6076,'SelectedBytes':685802,'ContextLock':1140,'RWLockAcquiredReadLocks':193,'RWLockReadersWaitMilliseconds':4,'RealTimeMicroseconds':1585163,'UserTimeMicroseconds':889767,'SystemTimeMicroseconds':13630,'SoftPageFaults':1947,'OSCPUWaitMicroseconds':6,'OSCPUVirtualTimeMicroseconds':903251,'OSReadChars':28631,'OSWriteChars':28888,'QueryProfilerRuns':3,'LogTrace':79,'LogDebug':24}

1 row in set. Elapsed: 0.010 sec.
```