# Percona Monitoring and Management 2.9.1

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      <th class="field-name">Date:</th>
      <td class="field-body">August 4, 2020</td>
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      <th class="field-name">Installation:</th>
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        <a class="reference external" href="https://www.percona.com/doc/percona-monitoring-and-management/2.x/setting-up/">Installing Percona Monitoring and Management</a></td>
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Percona Monitoring and Management (PMM) is a free and open-source platform for managing and monitoring MySQL, MongoDB, and PostgreSQL performance.

## Improvements

- [PMM-6230](https://jira.percona.com/browse/PMM-6230): Custom dashboards set as Home remain so after update
- [PMM-6300](https://jira.percona.com/browse/PMM-6300): Query Analytics Dashboard: Column sorting arrows made easier to use (Thanks to user debug for reporting this issue)
- [PMM-6208](https://jira.percona.com/browse/PMM-6208): Security Threat Tool: Temporarily silence viewed but un-actioned alerts
- [PMM-6315](https://jira.percona.com/browse/PMM-6315): Query Analytics Dashboard: Improved metrics names and descriptions
- [PMM-6274](https://jira.percona.com/browse/PMM-6274): MySQL User Details Dashboard: View selected user's queries in Query Analytics Dashboard
- [PMM-6266](https://jira.percona.com/browse/PMM-6266): Query Analytics Dashboard: Pagination device menu lists 25, 50 or 100 items per page
- [PMM-6262](https://jira.percona.com/browse/PMM-6262): PostgreSQL Instance Summary Dashboard: Descriptions for all 'Temp Files' views
- [PMM-6253](https://jira.percona.com/browse/PMM-6253): Query Analytics Dashboard: Improved SQL formatting in Examples panel
- [PMM-6211](https://jira.percona.com/browse/PMM-6211): Query Analytics Dashboard: Loading activity spinner added to Example, Explain and Tables tabs
- [PMM-6162](https://jira.percona.com/browse/PMM-6162): Consistent sort order in dashboard drop-down filter lists
- [PMM-5132](https://jira.percona.com/browse/PMM-5132): Better message when filter search returns nothing

## Bugs Fixed

- [PMM-5783](https://jira.percona.com/browse/PMM-5783): Bulk failure of SHOW ALL SLAVES STATUS scraping on PS/MySQL distributions triggers errors
- [PMM-6294](https://jira.percona.com/browse/PMM-6294): Query Analytics Dashboard doesn't resize well for some screen resolutions (Thanks to user debug for reporting this issue)
- [PMM-6420](https://jira.percona.com/browse/PMM-6420): Wrong version in successful update pop-up window
- [PMM-6319](https://jira.percona.com/browse/PMM-6319): Query Analytics Dashboard: Query scrolls out of view when selected
- [PMM-6302](https://jira.percona.com/browse/PMM-6302): Query Analytics Dashboard: Unnecessary EXPLAIN requests
- [PMM-6256](https://jira.percona.com/browse/PMM-6256): Query Analytics Dashboard: `InvalidNamespace` EXPLAIN error with some MongoDB queries
- [PMM-6329](https://jira.percona.com/browse/PMM-6329): Query Analytics Dashboard: Unclear origin of sparkline tool-tip on mouse-over
- [PMM-6259](https://jira.percona.com/browse/PMM-6259): Query Analytics Dashboard: Slow appearance of query time distribution graph for some queries
- [PMM-6189](https://jira.percona.com/browse/PMM-6189): Disk Details Dashboard: Disk IO Size chart larger by factor of 512
- [PMM-6269](https://jira.percona.com/browse/PMM-6269): Query Analytics Dashboard: Metrics drop-down list obscured when opened
- [PMM-6247](https://jira.percona.com/browse/PMM-6247): Query Analytics Dashboard: Overview table not resizing on window size change
- [PMM-6227](https://jira.percona.com/browse/PMM-6227): Home Dashboard redirection to Node Summary Dashboard not working