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pgreplay - PostgreSQL log file re-player
- Description:
pgreplay reads a PostgreSQL log file (not a WAL file), extracts the SQL
statements and executes them in the same order and relative time against
a PostgreSQL database cluster.
If the execution of statements gets behind schedule, warning messages
are issued that indicate that the server cannot handle the load in a
timely fashion. The idea is to replay a real-world database workload as
exactly as possible.
pgreplay is useful for performance tests, particularly in the following
situations:
* You want to compare the performance of your PostgreSQL application
on different hardware or different operating systems.
* You want to upgrade your database and want to make sure that the new
database version does not suffer from performance regressions that
affect you.
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