Skip to content
ClickHouse Docs
ClickHouse DocsClickHouse Docs
49.6kGet Started

system.user_processes

View as MarkdownEdit this pageReport an issueSet up docs MCP

描述

可使用此系统表查看用户的内存使用情况和 ProfileEvents 概览。

列

  • user (String) — 用户名。
  • memory_usage (Int64) — 该用户所有进程使用的 RAM 总量。可能不包括某些类型的专用内存。请参阅 max_memory_usage 设置。
  • peak_memory_usage (Int64) — 该用户的内存使用峰值。当该用户未运行任何查询时，该值可能会被重置。
  • ProfileEvents (Map(LowCardinality(String), UInt64)) — 用于衡量该用户不同指标的 ProfileEvents 汇总。其说明可在 system.events 表中找到。

别名：

  • ProfileEvents.Names — mapKeys(ProfileEvents) 的别名。
  • ProfileEvents.Values — mapValues(ProfileEvents) 的别名。

示例

SELECT * FROM system.user_processes LIMIT 10 FORMAT Vertical;
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.
Navigation