Lack of free swap space on Dynatrace Managed server

james_clarke — Mon, 17 Apr 2023 07:46:11 GMT

Swap on our server is set be made available at boot, however for whatever reason it is currently not available (note: this is non-impacting).

Could you let me know if this is a Dynatrace requirement not to have swap enabled? – judging by a quick Google it seems JVM based apps prefer to control memory usage, not requiring swap, so something like Dynatrace might possibly be removing it?

If this is the case, should we just prevent swap to be mounted at boot to permanently prevent or instead mount swap now if it should be used?

Re: Lack of free swap space on Dynatrace Managed server

Radoslaw_Szulgo — Wed, 12 Mar 2025 12:35:06 GMT

Hi,

take a look at our help page here: Set up a cluster

What happens during installation?

The installer also optimizes operating system settings:

Swap is turned off (with swapoff).

Note that enabling swap can result in undesired behavior and so isn't supported.

topic Re: Lack of free swap space on Dynatrace Managed server in Dynatrace Managed Q&A

Lack of free swap space on Dynatrace Managed server

Re: Lack of free swap space on Dynatrace Managed server