Adding PostgreSQL DB slow query log #6437
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| Enable slow query logging in PostgreSQL and leave it enabled to gather data over time. PostgreSQL's slow query log helps you identify queries that take longer than a specified amount of time. The slow query log isn't enabled by default, and must be enabled manually. | ||
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| To enable slow query logging globally, change the following line in postgresql.conf and reload the page: ``log_min_duration_statement = 5000``. When you this value to ``5000``, PostgreSQL considers queries that take longer than 5 seconds to be slow queries and logs them in the log file. |
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I'd set our suggestion to 1s for this, just to capture more. Anything longer than 1s really should be looked at.
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| postgres=# ALTER DATABASE test SET log_min_duration_statement = 5000; |
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let's change test to mattermost and make a call out that the database name should be what you call it. 99% will be mattermost
| Enable slow query logging in PostgreSQL and leave it enabled to gather data over time. PostgreSQL's slow query log helps you identify queries that take longer than a specified amount of time. The slow query log isn't enabled by default, and must be enabled manually. | ||
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| To enable slow query logging globally, change the following line in postgresql.conf and reload the page: ``log_min_duration_statement = 5000``. When you this value to ``5000``, PostgreSQL considers queries that take longer than 5 seconds to be slow queries and logs them in the log file. |
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also, doing it this way requires a restart or a config reload. We have it reading as reload the page but it should be restart postgres which causes a short outage.
Additionally, we could just have them run SELECT pg_reload_conf(); to reload the config without a restart.
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| postgres=# ALTER DATABASE test SET log_min_duration_statement = 5000; | ||
| ALTER DATABASE |
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This actually should be removed, it's just a hanging statement if used in this way.
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Thanks @coltoneshaw! This docs PR is now ready for your final review. |
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Troubleshooting for high-scale deployments