Bug ID 449920: Memory leak using compression on BIG-IP 2000-series and 4000-series appliances

Last Modified: Jul 18, 2026

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

Known Affected Versions:
11.5.1, 11.5.1 hf1, 11.5.1 hf2, 11.5.1 hf3, 11.5.1 hf4, 11.5.1 hf5, 11.5.1 hf6, 11.5.1 hf7, 11.5.1 hf8, 11.5.1 hf9, 11.5.1 hf10, 11.5.1 hf11, 11.5.2, 11.5.2 hf1, 11.5.3, 11.5.3 hf1, 11.5.3 hf2, 11.5.4, 11.5.4 hf1, 11.5.4 hf2, 11.5.4 hf3, 11.5.4 hf4, 11.5.5, 11.5.6, 11.5.7, 11.5.8, 11.5.9, 11.5.10

Fixed In:
11.6.0

Opened: Feb 22, 2014

Severity: 3-Major

Related Article: K15969

Symptoms

While running BIG-IP on 2000-series and 4000-series appliances with compression enabled, xdata memory usage rapidly increases and can result in an out-of-memory condition and subsequent TMM core.

Impact

Performance degradation followed by out-of-memory condition and traffic outage due to TMM core.

Conditions

BIG-IP 2000-series and 4000-series appliances with compression enabled in an active profile.

Workaround

n/a

Fix Information

A memory leak using compression on BIG-IP 2000-series and 4000-series appliances was resolved.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips