SystemEDGE not reporting accurate memory utilization within CAPM

Products

• CA Virtual Assurance for IM

Issue/Introduction

• RHEL server is generating false memory utilization alert as per CAPM even after enabling buffers + cache as part of SystemEDGE free memory calculation.

Environment

Release : 12.9

Component : SEAGTU - SYSTEMEDGE AGENT LINUX / UNIX

Resolution

• The patch is T6DM043 which is applicable to SystemEDGE 5.9 on RHEL7.x.
• MemAvailable value was new metric introduced in RHEL7 within cat /proc/meminfo output.
• This new patch does not use buffers + cached for freemem calculation so you do not want to enable this.
• Instead It will only look at MemAvailable for the MemInUse calculation:
  memInUse 1.3.6.1.4.1.546.1.1.7.8.9.0
  MemTotal - MemAvailable = MemInUse.

This above calculation is a more accurate representation of true memory usage in RHEL7.