Bug ID 1067589: Memory leak in nsyncd

Last Modified: Feb 07, 2024

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

Known Affected Versions:
15.1.2,, 15.1.3,, 15.1.4,, 15.1.5,, 15.1.6,, 15.1.7, 15.1.8,,

Fixed In:
17.1.0, 16.1.4, 15.1.9

Opened: Dec 12, 2021

Severity: 3-Major


The memory usage for nsyncd increases over time, forcing the device into OOM (out of memory).


OOM activity causes random process restarts and disruption.


-- High availability (HA) environment with ASM sync failover device group. -- ASU files are being installed by Live Update.


Restart the nsyncd daemon.

Fix Information

Added a new parameter 'maxMemory' to the nsyncd configuration file: /usr/share/nsyncd/config/config.properties # 450 MB maxMemory=450000000 Nsyncd daemon will limit its memory usage to the configured value, and restart if the value is exceeded.

Behavior Change

Guides & references

K10134038: F5 Bug Tracker Filter Names and Tips