Bug ID 520380: save-on-auto-sync can spawn multiple invocations of tmsh, starving system of memory

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, 11.6.0, 11.6.0 hf1, 11.6.0 hf2, 11.6.0 hf3, 11.6.0 hf4, 11.6.0 hf5, 11.6.0 hf6, 11.6.0 hf7, 11.6.0 hf8, 12.0.0, 12.0.0 hf1, 12.0.0 hf2, 12.0.0 hf3, 12.0.0 hf4

Fixed In:
12.1.0, 11.6.1, 11.5.4

Opened: Apr 28, 2015

Severity: 3-Major

Related Article: K41313442

Symptoms

Unit demonstrates behaviors consistent with out-of-memory condition. 'top' and 'ps' may show multiple tmsh processes waiting to run.

Impact

Low memory condition may result in system instability.

Conditions

Enable auto-sync and save-on-auto-sync.

Workaround

None.

Fix Information

Enabled auto-sync and save-on-auto-sync no longer causes out-of-memory condition.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips