Help Center/ GaussDB/ Developer Guide(Centralized_2.x)/ Schemas/ DBE_PERF Schema/ Cache/IO/ GLOBAL_STAT_SESSION_CU

Updated on 2023-10-23 GMT+08:00

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GLOBAL_STAT_SESSION_CU

GLOBAL_STAT_SESSION_CU is used to query the CU hit rate of running sessions on each node in the database. The data about a session is cleared when you exit this session or restart the database.

**Table 1** GLOBAL_STAT_SESSION_CU columns
Name	Type	Description
mem_hit	integer	Number of memory hits
hdd_sync_read	integer	Number of synchronous hard disk reads
hdd_asyn_read	integer	Number of asynchronous hard disk reads

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