temBoard 7.11 : performance and reliability

Hello everyone,

A new maintainance version of temBoard 7 has landed. This 7.11 release improves
reliability and performances.

temBoard is a monitoring and administration tool for PostgreSQL instances fleet.
Its non-intrusive design eases deployment without weakening your PostgreSQL
instance. temBoard alerts you, allows you to handle locks, bloat, configuration
and more - remotely.

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## Bugfixes

temBoard 7.10 introduced a regression breaking monitoring probe for replication
lag. An old error prevented temBoard from purging statements data. temBoard 7.11
fixes both errors.

## Performances

temBoard 7.11 now schedules the collect of monitoring data by batch. This
improves a lot system performances on temBoard machine for big fleet.

## Better Docker Images

temBoard 7 has its own docker images label dalibo/temboard:7 and
dalibo/temboard-agent:7. Multi-stage build has reduced the size of final image.
dalibo/temboard:7 is now running on top of python:3.7 instead of 2.7.

## And More...

For better reliability, `temboard-agent-register` command now checks agent using
agent key. This prevent confusion between several installation of temBoard agent
on the same machine.

- [Changelog of 7.11](https://temboard.readthedocs.io/en/v7/CHANGELOG/#711-2022-05-23).
- [temBoard on GitHub](https://dali.bo/temboard_github).
- [Documentation](https://temboard.readthedocs.io/en/v7/).

## Availability

Follow [installation documentation] to get temBoard from RPM, deb or sources.

[installation documentation]: https://temboard.readthedocs.io/en/v7/server_install/

## What comes next ?

Development of next major release of temBoard has started. This is a big work of
modernizations, improvements in security, stability, performances and features
for temBoard while keeping simplicity and compatibility. Stability and
performances of version 7.11 give us the serenity to work on this big release
awaited for 2022. In the meantime, enjoy 7.11!

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**temBoard is a free software maintained by [Dalibo Labs].**

[Dalibo Labs]: https://dali.bo/labs