72 lines
2.6 KiB
Markdown
72 lines
2.6 KiB
Markdown
# PostgreSQL plugin
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This postgresql plugin provides metrics for your postgres database. It has been designed to parse a sql query json file with some parameters.
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For now the plugin only support one postgresql instance, the plan is to be able to extend easily your postgres monitoring.
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View to create :
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-- View: public.sessions
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DROP VIEW public.sessions;
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CREATE OR REPLACE VIEW public.sessions AS
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WITH proctab AS (
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SELECT pg_proctab.pid,
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CASE
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WHEN pg_proctab.state::text = 'R'::bpchar THEN 'running'::text
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WHEN pg_proctab.state::text = 'D'::bpchar THEN 'sleep-io'::text
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WHEN pg_proctab.state::text = 'S'::bpchar THEN 'sleep-waiting'::text
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WHEN pg_proctab.state::text = 'Z'::bpchar THEN 'zombie'::text
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WHEN pg_proctab.state::text = 'T'::bpchar THEN 'stopped'::text
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ELSE NULL::text
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END AS proc_state,
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pg_proctab.ppid,
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pg_proctab.utime,
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pg_proctab.stime,
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pg_proctab.vsize,
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pg_proctab.rss,
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pg_proctab.processor,
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pg_proctab.rchar,
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pg_proctab.wchar,
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pg_proctab.syscr,
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pg_proctab.syscw,
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pg_proctab.reads,
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pg_proctab.writes,
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pg_proctab.cwrites
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FROM pg_proctab() pg_proctab
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), stat_activity AS (
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SELECT pg_stat_activity.datname,
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pg_stat_activity.pid,
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pg_stat_activity.usename,
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CASE
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WHEN pg_stat_activity.query IS NULL THEN 'no query'::text
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ELSE regexp_replace(pg_stat_activity.query, '[\n\r]+'::text, ' '::text, 'g'::text)
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END AS query
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FROM pg_stat_activity
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)
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SELECT ('"'::text || stat.datname::text) || '"'::text AS db,
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('"'::text || stat.usename::text) || '"'::text as username,
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stat.pid AS pid,
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('"'::text || proc.proc_state ::text) || '"'::text AS state,
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('"'::text || stat.query::text) || '"'::text AS query,
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proc.utime AS session_usertime,
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proc.stime AS session_systemtime,
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proc.vsize AS session_virtual_memory_size,
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proc.rss AS session_resident_memory_size,
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proc.processor AS session_processor_number,
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proc.rchar AS session_bytes_read,
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proc.wchar AS session_bytes_written,
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proc.syscr AS session_read_io,
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proc.syscw AS session_write_io,
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proc.reads AS session_physical_reads,
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proc.writes AS session_physical_writes,
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proc.cwrites AS session_cancel_writes
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FROM proctab proc,
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stat_activity stat
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WHERE proc.pid = stat.pid;
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ALTER TABLE public.sessions
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OWNER TO postgres;
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