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Merge pull request #197 from nastena1606/PG-353-Release-notes-RC2 

PG-353 Release notes RC2
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Below is the complete list of release notes for every version of ``pg_stat_monitor``.
## 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`
## REL0_9_0_STABLE
### Improvements