Poor performance from excessive garbage collection in the Excel plugin
Platform Notice: Data Center Only - This article only applies to Atlassian products on the Data Center platform.
Note that this KB was created for the Data Center version of the product. Data Center KBs for non-Data-Center-specific features may also work for Server versions of the product, however they have not been tested. Support for Server* products ended on February 15th 2024. If you are running a Server product, you can visit the Atlassian Server end of support announcement to review your migration options.
*Except Fisheye and Crucible
This problem is related to a third party plugin, and therefore not supported by Atlassian. See Atlassian Supported Plugins for more information.
Problem
Confluence is performing poorly. GC logs show constant garbage collection but there is a large amount of memory free.
Cause
Versions of Excel Plugin pre 3.6 include a version of JexcelAPI that resulted in repeated explicit garbage collection causing major performance issues.
Resolution
Upgrade to version 3.6 or later of the Excel Plugin.
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