Paweł Domański
50 lines
1.1 KiB
Bash
50 lines
1.1 KiB
Bash
#!/bin/bash
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# Shows cache hit ratio for all databases
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USER=""
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PORT=""
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DBNAME="postgres"
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usage() {
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echo "Usage: $0 [-d <dbname> -h <host> -U <user> -p <port>]"
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exit 1
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}
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while getopts "d:h:p:uU:" OPT;
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do case "${OPT}" in
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d) DBNAME=$OPTARG
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;;
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h) HOST="-h $OPTARG"
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;;
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p) PORT="-p $OPTARG"
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;;
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U) USER="-U $OPTARG"
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;;
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u) usage
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;;
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[?]) usage
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esac;
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done
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if [ "$DBNAME" = "" ]
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then
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usage
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exit 1
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fi
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psql $USER $HOST $PORT $DBNAME <<_EOF_
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SELECT pg_stat_database.datname,
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pg_stat_database.blks_read,
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pg_stat_database.blks_hit,
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round((pg_stat_database.blks_hit::double precision
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/ (pg_stat_database.blks_read
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+ pg_stat_database.blks_hit
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+1)::double precision * 100::double precision)::numeric, 2) AS cachehitratio
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FROM pg_stat_database
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WHERE pg_stat_database.datname !~ '^(template(0|1)|postgres)$'::text
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ORDER BY round((pg_stat_database.blks_hit::double precision
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/ (pg_stat_database.blks_read
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+ pg_stat_database.blks_hit
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+ 1)::double precision * 100::double precision)::numeric, 2) DESC;
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_EOF_
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