Investigating an NPM memory usage alarm

Products

• XOS

Issue/Introduction

This article discusses steps to take when starting investigation of an NPM memory usage alarm.An entry similar to the following line is present in "/var/log/messages" file:

cbsalarmlogrd: AlarmID 321735 | Thu Dec 5 08:50:42 2013 | major | np1 | npmOutOfMemory | NPM memory usage

The CLI displays an active alarm for NPM memory usage:

CBS# show alarms active major

Major: 

 ID      Date             Source   Description

 --      ----             ------   -----------

 14574   Dec  5 08:50:42  np1      NPM memory usage

Cause

This article discusses steps to take when starting investigation of an NPM memory usage alarm.

Resolution

1. Verify that XOS configuration doesn't contain any old troubleshooting statements: 

• trace option in IP flow rules
• acl-interface and acl-interface-mapping

2. Collect details about the alarm

CBS# show alarms active major verbose

When the alarm isn't active anymore, run this command:

CBS# show alarms history major verbose


3. Telnet to the NPM and capture the following output

CBS# unix su
# telnet npm<N>

cat /proc/meminfo
du -x /
ps
cat /proc/*/status
ifconfig -a
cat /etc/syslog.conf


4. Contact Blue Coat technical support and provide the collected data for review.

Workaround

N/A