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These parameters control server-wide statistics collection features.
When statistics collection is enabled, the data that is produced can be
accessed via the pg_stat and
pg_statio family of system views.
Refer to Chapter 26 for more information.
- track_activities (boolean)
Enables the collection of information on the currently
executing command of each session, along with the time at
which that command began execution. This parameter is on by
default. Note that even when enabled, this information is not
visible to all users, only to superusers and the user owning
the session being reported on; so it should not represent a
security risk.
Only superusers can change this setting.
- track_counts (boolean)
Enables collection of statistics on database activity.
This parameter is on by default, because the autovacuum
daemon needs the collected information.
Only superusers can change this setting.
- update_process_title (boolean)
Enables updating of the process title every time a new SQL command
is received by the server. The process title is typically viewed
by the ps command,
or in Windows by using the Process Explorer.
Only superusers can change this setting.
- log_statement_stats (boolean)
log_parser_stats (boolean)
log_planner_stats (boolean)
log_executor_stats (boolean) For each query, write performance statistics of the respective
module to the server log. This is a crude profiling
instrument. log_statement_stats reports total
statement statistics, while the others report per-module statistics.
log_statement_stats cannot be enabled together with
any of the per-module options. All of these options are disabled by
default. Only superusers can change these settings.
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