Very slow On Premises

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Tech
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General navigation around the admin console is very slow.
The builds are fine.
Saving changes and create new projects and build steps is taking forever.
Even when clicking on the build it takes some time to load the tabs to see the build log.
VM and database are not the issue as they are pretty high on resources. 

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Mikhail Efremov
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Hi,

Could you please reproduce the issue and capture a set of server thread dumps? You can make the server save 120 thread dumps with a 5-second interval by adding the below records to your internal properties. This should cover ten minutes of the server's life. The server will start making the thread dumps as soon as you add the properties.

teamcity.diagnostics.periodicThreadDumps.name=performance_issue
teamcity.diagnostics.periodicThreadDumps.count=120
teamcity.diagnostics.periodicThreadDumps.period.ms=5000

Once done, please collect the thread dumps along with the teamcity-server.log that covers the same timeframe, add everything into a single archive and upload it to https://uploads.jetbrains.com/, then let me know the upload ID. 

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Dunge2
Created

Did you end up finding some reason for your slowness?

I recently upgraded from 2024.03.2 (build 156319) to 2025.03 (build 186049) and the difference is day and night.

Build agents are fast, but the main web server UI takes over 5-10 seconds to change from one page to another. If I click too fast I often get the “Something went wrong” page with detail “NetworkError when attempting to fetch resource.”. 

I checked my CPU/RAM/Disk usage and nothing is peaking or excessive.

I am still using the internal database and I see there's a performance warning about it, but I did not have this kind of problem with the previous version.

I did not collect threads dumps yet, but might do it soon.

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