Version 2.3.0

New features:

• Track entry creation timestamp (Julien Rouhaud, thanks to Andrei Zubkov for the feature request)

Bugfix:

• Fix some issues with tracking nesting level (Julien Rouhaud)
• Fix the pgsk_counters_hook declaration (Julien Rouhaud)

Miscellaneous:

• Add postgres 17 compatibility (Georgy Shelkovy)

Version 2.2.3

Miscellaneous:

• Improve performance for workloads with a high number of clients (Julien Rouhaud, thanks to Vitaliy Kukharik for the report)

Version 2.2.1

Bugfix:

• Fix memory allocation on postgres 12 and above (Julien Rouhaud)

New features:

• Expose some structures and add a counters hook so other extensions can
  extend this extension's metrics (Sviatoslav Ermilin)

Miscellaneous:

• Various improvements to the debian packaging (Christoph Berg)
• Add compatibility with postgres 15 (Julien Rouhaud)
• Improve extension update documentation (Julien Rouhaud)

Version 2.2.0

New features:

• Add pg_stat_kcache.track option, similar to pg_stat_statements (Julien
  Rouhaud and github user mikecaat)
• Add pg_stat_kcache.track_planning, similar to pg_stat_statements, to
  track usge during planning, and maintain 2 sets of counters, depending on
  whether it was during planning or execution. Requires PostgreSQL 13 or
  above (Julien Rouhaud, github user mikecaat)
• Add a new "top" column, and accumulate resource usage in different entries
  depending on whether queries are executed at top level or at nested
  statements. (github user mikecaat and Julien Rouhaud)

Version 2.1.3

Bugfix:

• Fix memory corruption introduced in v2.1.2 that can cause a PostgreSQL
  crash (Julien Rouhaud, thanks to github user tbe, Nikolay Samokhvalov and
  Andreas Seltenreich for reporting the issue and the extensive checking)

Version 2.1.2

Bugfix:

• Accumulate counters for parallel workers too (Julien Rouhaud, thanks to Atsushi Torikoshi for the report)

version 2.1.1

Bugfix:

• Fix usage increase, used to keep the most frequent entries in memory
  (Julien Rouhaud)

Miscellaneous:

• Allow PG_CONFIG value to be found on command-line (edechaux)
• Warn users about incorrect GUC (Julien Rouhaud)
• Add debian packaging (Julien Rouhaud)

Version 2.1.0

NOTE: This version requires a change to the on-disk format. After
installing the new version restarting PostgreSQL, any previously accumulated
statistics will be reset.

• Add support for architecture that don't provide getrusage(2), such as
  windows. Only user time and system time will be available on such
  platforms (Julien Rouhaud).
• Expose more fields of getrusage(2). Depending on the platform, some of
  these fields are not maintained (Julien Rouhaud).
• Add a workaround for sampling problems with getrusage(), new parameter
  pg_stat_kcache.linux_hz is added. By default, this parameter is discovered
  at server startup (Ronan Dunklau).
• Add compatibility with PostgreSQL 11 (Thomas Reiss)
• Fix issue when concurrently created entries for the same user, db and
  queryid could lost some execution counters (Mael Rimbault)
• Do not install docs anymore (Ronan Dunklau)

version 2.0.3

• Add PG 9.6 compatibility
• Fix issues in shared memory estimation, which could prevent starting postgres or reduce the amount of possible locks (thanks to Jean-Sébastien BACQ for the report)
• Add hint of possible reasons pgss.max could not be retrieved, which could prevent starting postgres

version 2.0.2

• Fix another bug with 32 bits builds (thanks to Alain Delorme for reporting it)