'\" t
.\"     Title: SHOW POOL_CACHE
.\"    Author: The Pgpool Global Development Group
.\" Generator: DocBook XSL Stylesheets vsnapshot <http://docbook.sf.net/>
.\"      Date: 2023
.\"    Manual: pgpool-II 4.3.5 Documentation
.\"    Source: pgpool-II 4.3.5
.\"  Language: English
.\"
.TH "SHOW POOL_CACHE" "1" "2023" "pgpool-II 4.3.5" "pgpool-II 4.3.5 Documentation"
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.SH "NAME"
SHOW_POOL_CACHE \- displays cache storage statistics
.SH "SYNOPSIS"
.sp
.nf
   SHOW POOL_CACHE
  
.fi
.SH "DESCRIPTION"
.PP
\fBSHOW POOL_CACHE\fR
displays
in memory query cache
statistics if in memory query cache is enabled\&. Here is an example session:
.sp
.if n \{\
.RS 4
.\}
.nf
    test=# \ex
    \ex
    Expanded display is on\&.
    test=# show pool_cache;
    show pool_cache;
    \-[ RECORD 1 ]\-\-\-\-\-\-\-\-\-\-\-\-\-\-\-+\-\-\-\-\-\-\-\-\-
    num_cache_hits              | 891703
    num_selects                 | 99995
    cache_hit_ratio             | 0\&.90
    num_hash_entries            | 131072
    used_hash_entries           | 99992
    num_cache_entries           | 99992
    used_cache_entries_size     | 12482600
    free_cache_entries_size     | 54626264
    fragment_cache_entries_size | 0
   
.fi
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.RE
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.PP
If the cache storage is memcached, values for all columns except num_cache_hits, num_selects and cache_hit_ratio show 0\&.
.sp .5v
.RE