Confluence diagnostics: low free memory
Platform Notice: Data Center - This article applies to Atlassian products on the Data Center platform.
Note that this knowledge base article was created for the Data Center version of the product. Data Center knowledge base articles 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 diagnostic alert warns you when your operating system's free memory falls below a set threshold on your Confluence server, or individual Confluence node. The threshold is calculated as a percentage.
The following appears in the application log:
WARNING ; OS ; OS-1001 ; Low free memory ; not-detected ; ; ; {"freeInMegabytes":...,"totalInMegabytes":...,"minimumInMegabytes":...}This alert is enabled by default in Confluence 6.11 or later.
To resolve this issue
To resolve this issue you'll need to either provision more memory, or free up memory by moving non-essential applications or utilities to another server.
What will happen if I ignore this alert?
Your site may be more susceptible to out of memory errors, which can lead to Confluence crashing when Confluence is performing memory intensive tasks.
Can I change the threshold?
Yes, you can change the threshold of this alert using the following system property:
diagnostics.os.min.free.memory.megabytes
See Configuring System Properties for more information on setting system properties.