Memory usage constantly increases on Security Gateway running on Gaia OS and SecurePlatform OS

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Technical Level

Solution ID	sk95128
Technical Level
Product	Quantum Security Gateways, IPSec VPN
Version	R75.40 (EOL), R75.40VS (EOL), R75.45 (EOL), R75.46 (EOL), R75.47 (EOL), R76 (EOL)
OS	Gaia, SecurePlatform 2.6
Platform / Model	All
Date Created	23-Sep-2013
Last Modified	08-Jan-2018

Symptoms

Output of 'fw ctl pstat' command on Security Gateway shows that memory consumption constantly increases.
Security Gateway machine runs out of memory.
/var/log/messages files repeatedly show that Out-of-Memory (OOM) mechanism is invoked by Linux kernel:
Daemon_Name invoked oom-killer
/var/log/messages files repeatedly show various issue with memory allocation:
nmpd[PID]: Error allocating more space for arpcache.

Cause

There are scenarios, when the current FireWall memory allocation limit does not stop the FireWall from allocating additional memory on time - for example, during resiliency tests, and concurrent connections tests on traffic from IP range of Class B to IP range of Class B.

Solution

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