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patternsqlMinor

Postgres Log Table

Submitted by: @import:stackexchange-dba··
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tablepostgreslog

Problem

Is there a table that with the log file information in postgres? I wish to create a view/report of the information in the postgres logs. I'd like to do something like:

SELECT *
FROM log_table;

Solution

Fortunately PostgreSQL does not log to a table, because the performance penalty would be forbidding on an active database — logging to a file is much cheaper.

You can still get what you want:

-
Configure log_destination = csvlog (see the documentation for a description of the format and how it matches a database table layout).

-
You can either load the log file into a database table with COPY or use file_fdw to define an “external table” for it (the latter has the advantage of using no space in the database, but it only allows sequential scans).

-
Either way, you can use table partitioning to unify the individual log files to a single partitioned log table that you can query (optional of course).

Context

StackExchange Database Administrators Q#238408, answer score: 4

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