we've been using Stash for a while (upgraded to multiple versions, we're now on 3.1.3)
We're having an issue where Stash will just slowdown, and the web interface responses really slowly and then just grinds to an halt. Running a TOP -C will show us that there is almost 100% memory usage. We can't find anything in the logs as well.
We have a license for 500 users but we have about 300 accounts created.
We are running Linux RedHat 6.4 with 2 VCPUs and 8 gigs of ram.
Any help would be appreciated,
The type of slowdowns you're seeing and the fact that almost 100% memory is being used is an indication that the Stash process/memory is being swapped in and out of RAM.
In your top -C can you see which processes are using the memory? My guess is that it might be the git processes that are being executed when you clone a repository. The Stash process itself is designed to be able to run with a modest footprint, but the git processes that are forked by Stash are much more variable. Do you by any chance have large repositories that are cloned at (relatively) high frequency?
Because of the CPU and memory usage of these git processes, Stash limits the amount of git processes that it will execute concurrently. See https://confluence.atlassian.com/display/STASH/Scaling+Stash for more background information. If you've changed the configuration option that controls the amount of concurrency (throttle.resource.scm-hosting), you'll either have to scale that value back or add more memory to the machine.
There a few plugins which can use some CPU (especcially those who scan repositories for information).
Thats one possible source, which do you have installed?
Second, 2 VCPUS could be just too less, checkout this page: https://confluence.atlassian.com/display/STASH/Scaling+Stash
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