PostgreSQL : ajout info pour pg_stat_statements
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@ -912,9 +912,27 @@ Installation :
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~~~
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### pg_stats_statement
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### pg_stat_statements
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(TODO)
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`pg_stat_statements` est une extension PostgreSQL permettant de collecter des statistiques sur les requêtes reçues.
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Installation :
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~~~
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# apt install postgresql-contrib-9.6
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~~~
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Activation :
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~~~
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shared_preload_libraries = 'pg_stat_statements'
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~~~
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On a maintenant accès à une vue contenant des informations utiles :
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~~~
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bench=# SELECT query, calls, total_time, rows, 100.0 * shared_blks_hit / nullif(shared_blks_hit + shared_blks_read, 0) AS hit_percent FROM pg_stat_statements ORDER BY total_time DESC LIMIT 5;
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~~~
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## Réplication
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