Michael Paquier 75534436a4 injection_points: Add some cumulative stats for injection points ... This acts as a template of what can be achieved with the pluggable cumulative stats APIs introduced in 7949d95945 for the variable-numbered case where stats entries are stored in the pgstats dshash, while being potentially useful on its own for injection points, say to add starting and/or stopping conditions based on the statistics (want to trigger a callback after N calls, for example?). Currently, the only data gathered is the number of times an injection point is run. More fields can always be added as required. All the routines related to the stats are located in their own file, called injection_stats.c in the test module injection_points, for clarity. The stats can be used only if the test module is loaded through shared_preload_libraries. The key of the dshash uses InvalidOid for the database, and an int4 hash of the injection point name as object ID. A TAP test is added to provide coverage for the new custom cumulative stats APIs, showing the persistency of the data across restarts, for example. Author: Michael Paquier Reviewed-by: Dmitry Dolgov, Bertrand Drouvot Discussion: https://postgr.es/m/Zmqm9j5EO0I4W8dx@paquier.xyz		2024-08-05 12:06:54 +09:00
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src	injection_points: Add some cumulative stats for injection points	2024-08-05 12:06:54 +09:00
KNOWN_BUGS	Remove extra newlines at end and beginning of files, add missing newlines	2010-08-19 05:57:36 +00:00
Makefile	Remove distprep	2023-11-06 15:18:04 +01:00
MISSING_FEATURES	Remove extra newlines at end and beginning of files, add missing newlines	2010-08-19 05:57:36 +00:00
TODO	Change documentation references to PG website to use https: not http:	2017-05-20 21:50:47 -04:00