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# Release Notes
Below is the complete list of release notes for every version of ``pg_stat_monitor``.
## 2.0.3
### Bug Fixes
[GH-425](https://jira.percona.com/browse/PG-645) - pg_stat_monitor crashes PostgreSQL if there is citus library loaded
## 2.0.2
### Bug Fixes
[GH-418](https://github.com/percona/pg_stat_monitor/issues/418) - Fixed compilation issue with PG16 and added meson.build file.
## 2.0.1
### Bug Fixes
[PG-613](https://jira.percona.com/browse/PG-613) - Fixed the issue with segmentation fault error when the query plan is enabled on large queries.
[PG-624](https://jira.percona.com/browse/PG-624) - Fixed the server crash when running pgbench with pg_stat_monitor loaded by improving the handling of the dynamic number of buckets.
## 2.0.0
### Improvements
[PG-310](https://jira.percona.com/browse/PG-310): Bucket is “Done” vs still being current/last
[PG-400](https://jira.percona.com/browse/PG-400): Add timezone in datetime columns in pg_stat_monitor view.
[PG-435](https://jira.percona.com/browse/PG-435): PostgreSQL 15 Support by adding newly introduced columns
[PG-488](https://jira.percona.com/browse/PG-488): Update query buffer overflow management to use dynamic shared memory
[PG-543](https://jira.percona.com/browse/PG-543): PostgreSQL's pg_stat_statements compatible view.
[PG-545](https://jira.percona.com/browse/PG-545): Same query text should generate same queryid
[PG-569](https://jira.percona.com/browse/PG-569): Make all data types of pg_stat_monitor view compatible with pg_stat_statements
[PG-586](https://jira.percona.com/browse/PG-586): CPU and user timing should be captured for utility statements as well
[PG-588](https://jira.percona.com/browse/PG-588): Fix missing query and query normalization issue; rearchitect pg_stat_monitor
[PG-606](https://jira.percona.com/browse/PG-606): New GUC required for enabling/disabling of pgsm_query_id calculation
[PG-607](https://jira.percona.com/browse/PG-607): Allow histogram to track queries in sub-ms time brackets
### Bug Fixes
[PG-306](https://jira.percona.com/browse/PG-306): bucket_start_time - TEXT vs TIMESTAMP?
[PG-320](https://jira.percona.com/browse/PG-320): Remove state/state_code fields from pg_stat_monitor_view.
[PG-321](https://jira.percona.com/browse/PG-321): Remove redundant `cmd_type`/`cmd_type_text` columns in `pg_stat_monitor` view.
[PG-354](https://jira.percona.com/browse/PG-354): Remove pg_stat_monitor_settings view
[PG-373](https://jira.percona.com/browse/PG-373): Remove wal fields for PG12 and below
[PG-518](https://jira.percona.com/browse/PG-518): Internal Functions should NOT be visible in PGSM API.
[PG-579](https://jira.percona.com/browse/PG-579): Querying pg_stat_monitor view crashes the server when pg_stat_monitor.so is not configured in shared_preload_libraries
[PG-582](https://jira.percona.com/browse/PG-582): blk_read_time and blk_write_time are not being rounded.
[PG-583](https://jira.percona.com/browse/PG-583): Rounded time based values are not consistent
[PG-597](https://jira.percona.com/browse/PG-597): Remove rounding off for floating point values
[PG-569](https://jira.percona.com/browse/PG-569): Make all data types of pg_stat_monitor view compatible with pg_stat_statements
## 1.1.1
### Improvements
[PG-462](https://jira.percona.com/browse/PG-462): Initial Support for PostgreSQL15 was added
## 1.1.0
### Improvements
[PG-474](https://jira.percona.com/browse/PG-474): Make pg_stat_monitor compiled with CLANG
[PG-159](https://jira.percona.com/browse/PG-159): Change the bucket start time scheme to align with the bucket time size
[PG-293](https://jira.percona.com/browse/PG-293): Add the ability to control features added on top of `pg_stat_monitor` using GUC (Grand Unified Configuration) parameters
[PG-300](https://jira.percona.com/browse/PG-300): Improve compatibility with PMM by making QueryIDs persistent for the same queries across different buckets and regardless of the node / client a query is executed on.
[PG-362](https://jira.percona.com/browse/PG-362): Fix the `pgsm_normalized_query` default value to provide query examples in the `pg_stat_monitor` view by default.
[PG-439](https://jira.percona.com/browse/PG-439): Remove warning of comparison of unsigned enum expression
### Bugs Fixed
[PG-221](https://jira.percona.com/browse/PG-221): Fixed the issue with pg_stat_monitor crashing when querying JSON with parallel workers enabled
[PG-289](https://jira.percona.com/browse/PG-289): Fixed the issue with pg_stat_monitor failing to build on C11 compilers by removing 'for' loop initial declarations
[PG-449](https://jira.percona.com/browse/PG-449): Fix comments visibility by correcting the behavior of the `pgsm_extract_comments` parameter
[PG-453](https://jira.percona.com/browse/PG-453): Fixed query normalization for INSERT statements in PostgreSQL 13 and earlier versions
[PG-455](https://jira.percona.com/browse/PG-455): Fixed the issue with data collection for any value specified for `pgsm_bucket_time` parameter within the min / max range
## 1.0.1
### Bugs Fixed
[PG-382](https://jira.percona.com/browse/PG-382): Histogram default settings changed to prevent the PostgreSQL server to crash
[PG-417](https://jira.percona.com/browse/PG-417): Addressed security vulnerabilities to prevent an attacker from precreating functions
[DISTPG-427](https://jira.percona.com/browse/DISTPG-427): Fixed the issue with the extensions not working when pg_stat_monitor is enabled by replacing the `return` with `goto exit` for the `pgsm_emit_log_hook` function
## 1.0.0
Bump version from 1.0.0-rc.2 to 1.0.0.
## 1.0.0-rc.2
### Improvements
[PG-331](https://jira.percona.com/browse/PG-331): Changed the default value for the `pg_stat_monitor.pgsm_query_max_len` parameter from 1024 to 2048 for better data presentation in PMM
[PG-355](https://jira.percona.com/browse/PG-355): Changed the collection of `sys_time` and `user_time` metrics so that they are now presented as an accumulative value
[PG-286](https://jira.percona.com/browse/PG-286): Improved pg_stat_monitor performance by decreasing the overhead by more than 50%.
[PG-267](https://jira.percona.com/browse/PG-267): Added test case to verify histogram feature
[PG-359](https://jira.percona.com/browse/PG-359): Documentation: updated the `pg_stat_monitor_settings` view reference.
[PG-344](https://jira.percona.com/browse/PG-344): Documentation: Updated the extensions order and behavior with data collection for PostgreSQL 14.
[PG-358](https://jira.percona.com/browse/PG-358): Documentation: data display of `** blk **` and `** wal **` columns when both `pg_stat_monitor` and `pg_stat_statements` are loaded together.
### Bugs Fixed
[PG-350](https://jira.percona.com/browse/PG-350): Fixed bucket time overflow
[PG-338](https://jira.percona.com/browse/PG-338): Fixed query calls count by setting the default value for `pg_stat_monitor.pgsm_track` to `top`.
[PG-291](https://jira.percona.com/browse/PG-338): Fixed calls count.
[PG-325](https://jira.percona.com/browse/PG-325): Fixed deadlock that occurred when the query length exceeded the `pgsm_query_max_len` value.
[PG-326](https://jira.percona.com/browse/PG-326): Added validation for `pgsm_histogram_min` and `pgsm_histogram_max` ranges
[PG-329](https://jira.percona.com/browse/PG-329): Fixed creation of `pg_stat_monitor_errors` view on SQL files.
[PG-296](https://jira.percona.com/browse/PG-296): Fixed issue with the application name not displaying in the view when changed.
[PG-290](https://jira.percona.com/browse/PG-290): Fixed issue with PostgreSQL crashing after enabling debug log level and when `pg_stat_monitor` is enabled.
[PG-166](https://jira.percona.com/browse/PG-166): Fixed issue with displaying the actual system time values instead of `NULL`
[PG-369](https://jira.percona.com/browse/PG-358): Fixed issue with incorrect `wal_bytes` values for PostgreSQL 11 and 12 that caused Query Analytics failure in PMM by ignoring the `WalUsage` variable value for these versions.
## 1.0.0-rc.1
### Improvements
[PG-165](https://jira.percona.com/browse/PG-165): Recycle expired buckets
[PG-167](https://jira.percona.com/browse/PG-167): Make SQL error codes readable by updating their data types
[PG-193](https://jira.percona.com/browse/PG-193): Create a comment based tags to identify different parameters
[PG-199](https://jira.percona.com/browse/PG-199): Documentation: Add the integration with PMM section in User Guide
[PG-210](https://jira.percona.com/browse/PG-210): Documentation: Update column names per POstgreSQL version to match the upstream ones
### Bugs Fixed
[PG-177](https://jira.percona.com/browse/PG-177): Fixed the error in histogram ranges
[PG-214](https://jira.percona.com/browse/PG-214): Fixed the issue with the display of the error message as part of the query column in `pg_stat_monitor` view
[PG-246](https://jira.percona.com/browse/PG-246): Fixed the issue with significant CPU and memory resource usage when `pg_stat_monitor.pgsm_enable_query_plan` parameter is enabled
[PG-262](https://jira.percona.com/browse/PG-262): Fixed the way the comments are extracted in pg_stat_monitor view
[PG-271](https://jira.percona.com/browse/PG-271): Fixed the issue with enabling the ``pg_stat_monitor.pgsm_overflow_target`` configuration parameter.
[PG-272](https://jira.percona.com/browse/PG-272): Fixed the server crash when calling the `pg_stat_monitor_reset()` function by using the correct `PGSM_MAX_BUCKETS` GUC as the limit to the loop
## REL0_9_0_STABLE
### Improvements
[PG-186](https://jira.percona.com/browse/PG-186): Add support to monitor query execution plan
[PG-147](https://jira.percona.com/browse/PG-147): Store top query, instead of parent query.
[PG-188](https://jira.percona.com/browse/PG-188): Added a new column to monitor the query state i.e PARSING/PLANNING/ACTIVE/FINISHED.
[PG-180](https://jira.percona.com/browse/PG-180): Schema Qualified table/relations names.
Regression Test Suite.
### Bugs Fixed
[PG-189](https://jira.percona.com/browse/PG-189): Regression crash in case of PostgreSQL 11.
[PG-187](https://jira.percona.com/browse/PG-187): Compilation Error for PostgreSQL 11 and PostgreSQL 12.
[PG-186](https://jira.percona.com/browse/PG-186): Add support to monitor query execution plan.
[PG-182](https://jira.percona.com/browse/PG-182): Added a new option for the query buffer overflow.
[PG-181](https://jira.percona.com/browse/PG-181): Segmentation fault in case of track_utility is ON.
Some Code refactoring.
## REL0_8_1
[PG-147](https://jira.percona.com/browse/PG-147): Stored Procedure Support add parentid to track caller.
[PG-177](https://jira.percona.com/browse/PG-177): Error in Histogram ranges.
## REL0_8_0_STABLE
### Improvements
Column userid (int64) was removed.
Column dbid (int64) was removed.
Column user (string) was added (replacement for userid).
Column datname (string) was added (replacement for dbid).
[PG-176](https://jira.percona.com/browse/PG-176): Extract fully qualified relations name.
[PG-175](https://jira.percona.com/browse/PG-175): Only Superuser / Privileged user can view IP address.
[PG-174](https://jira.percona.com/browse/PG-174): Code cleanup.
[PG-173](https://jira.percona.com/browse/PG-173): Added new WAL usage statistics.
[PG-172](https://jira.percona.com/browse/PG-172): Exponential histogram for time buckets.
[PG-164](https://jira.percona.com/browse/PG-164): Query timing will be four decimal places instead of two.
[PG-167](https://jira.percona.com/browse/PG-167): SQLERRCODE must be in readable format.
### Bugs Fixed
[PG-169](https://jira.percona.com/browse/PG-169): Fixing message buffer overrun and incorrect index access to fix the server crash.
[PG-168](https://jira.percona.com/browse/PG-168): "calls" and histogram parameter does not match.
[PG-166](https://jira.percona.com/browse/PG-166): Display actual system time instead of null.
[PG-165](https://jira.percona.com/browse/PG-165): Recycle expired buckets.
[PG-150](https://jira.percona.com/browse/PG-150): Error while logging CMD Type like SELECT, UPDATE, INSERT, DELETE.
## REL0_7_2
[PG-165](https://jira.percona.com/browse/PG-165): Recycle expired buckets.
[PG-164](https://jira.percona.com/browse/PG-164): Query timing will be four decimal places instead of two.
[PG-161](https://jira.percona.com/browse/PG-161): Miscellaneous small issues.
## REL0_7_1
[PG-158](https://jira.percona.com/browse/PG-158): Segmentation fault while using pgbench with clients > 1.
[PG-159](https://jira.percona.com/browse/PG-159): Bucket start time (bucket_start_time) should be aligned with bucket_time.
[PG-160](https://jira.percona.com/browse/PG-160): Integration with PGXN.
## REL0_7_0_STABLE
### Improvements
[PG-153](https://jira.percona.com/browse/PG-153): Capture and record the application_name executing the query.
[PG-145](https://jira.percona.com/browse/PG-143): Add a new View/Query to show the actual Database name and Username.
[PG-110](https://jira.percona.com/browse/PG-110); Aggregate the number of warnings.
[PG-109](https://jira.percona.com/browse/PG-109): Log failed queries or queries with warning messages.
[PG-150](https://jira.percona.com/browse/PG-150): Differentiate different types of queries such as SELECT, UPDATE, INSERT or DELETE.
### Bugs Fixed
[PG-111](https://jira.percona.com/browse/PG-111) Show information for incomplete buckets.
[PG-148](https://jira.percona.com/browse/PG-148) Loss of query statistics/monitoring due to not enough “slots” available.
## v0.6.0
Initial Release.
## Master
### Improvements
[PG-156](https://jira.percona.com/browse/PG-156): Adding a placeholder replacement function for the prepared statement
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