Slow operation from JIRA version upgrade

[extid062_hallab_co_jp]

Hello

Upgrading JIRA from version 7.9.0 to 8.3.2, JIRA is generally slower.

Among them, the display of the dashboard feels very slow.

We added CPU and memory, added JVM memory with setenv.sh, etc., and adjusted pool in dbconfig.xml in anticipation of the number of simultaneous accesses, but there was no improvement.

Investigations can show many differences before and after upgrading the version. If you look at the file being read in the browser's debug console, you can see how much JS and CSS files are loaded.

After upgrading to JIRA8, it seems that a lot of JS and CSS files are loaded every time the page is displayed, but this loading time seems to be causing "slowness".

I did not improve even in safe mode, so I think it is a problem of JIRA itself, not an application (add-on).

If you know how to resolve these symptoms, please let me know and it will help.

Thank you.

[Daniel Ebers]

By adding JVM memory in some cases the situation gets even worse. I know it's tempting by some kind of logic to say: one wants to have a application that is running fast - so let's add memory - but performance tuning is not that easy.
There are many points to consider and, maybe, the slowdown is only some kind of coincidence - or a symptom, not a cause.

Without details about your deployment, specific hardware specs and all of the configuration files, debug output and further stuff it will be hard to state anything specific.

I'd recommend you to go through the troubleshooting documentation:
https://confluence.atlassian.com/jirakb/troubleshoot-performance-issues-in-jira-server-336169888.html

Is is very detailed and covers many of topics to consider. Starting from system over to database and Apps.

Cheers,
Daniel