Bug ID 667259: Memory Leak in RAM Cache

Last Modified: Jul 12, 2023

Affected Product(s):
BIG-IP LTM(all modules)

Known Affected Versions:
13.0.0, 13.0.0 HF1, 13.0.0 HF2, 13.0.0 HF3

Fixed In:
13.1.0, 13.0.1

Opened: May 31, 2017

Severity: 2-Critical

Related Article: K15364500


A slow increase in the magnitude of the value in the tm_header bucket of the memory_usage_stat table.


A memory leak whose speed is relative to the life time of the documents in the cache, and the number of documents that can be refreshed.


This occurs during a refresh of a cached document.


If the document cannot be refreshed, the memory leak won't occur. A server configuration change or a response iRule that removes the Last-Modified, Expires, and Cache-Control headers will allow the BIG-IP system to cache documents and serve them from cache, but will not attempt to refresh them and thus avoid this leak. This workaround results in retrieving the whole document from the server when it has expired.

Fix Information

Memory Leak in RAM Cache has been fixed.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips