Grid Control Agent 11.1: High Virtual Memory Consumption

By | December 23rd, 2010 | Category: Oracle Enterprise Manager | No Comments »

There is a known issue in Grid Control 11.1 Agents, which causes huge Virtual Memory Consumption. I have experienced virtual memory consumption of up to 5.6 GB for the emagent process:

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27

Resources PID: 14103, emagent PPID: 13773 euid: 172 User:agent
--------------------------------------------------------------------------------
CPU Usage (util): 2.5 Log Reads : 14 Wait Reason : OTHER
User/Nice/RT CPU: 2.5 Log Writes: 0 Total RSS/VSS :546.5mb/ 5.68gb
 
Regions PID: 14103, emagent PPID: 13773 euid: 172 User:agent
 
Type RefCt RSS VSS Locked File Name
--------------------------------------------------------------------------------
NULLDR/Shared 531 4kb 4kb 0kb <nulldref>
MEMMAP/Shared 2 8kb 32kb 0kb /var/.../14103
TEXT /Shared 2 12kb 12kb 0kb /opt/.../bin/emagent
DATA /Priv 1 131.4mb 144.0mb 0kb /opt/.../bin/emagent
MEMMAP/Priv 1 52kb 4.0mb 0kb <mmap>
UAREA /Priv 1 64kb 72kb 0kb <uarea>
UAREA /Priv 1 64kb 72kb 0kb <uarea>
UAREA /Priv 1 64kb 72kb 0kb <uarea>
UAREA /Priv 1 64kb 72kb 0kb <uarea>
UAREA /Priv 1 64kb 72kb 0kb <uarea>
MEMMAP/Priv 1 52kb 4.0mb 0kb <mmap>
UAREA /Priv 1 64kb 72kb 0kb <uarea>
UAREA /Priv 1 64kb 72kb 0kb <uarea>
UAREA /Priv 1 64kb 72kb 0kb <uarea>
UAREA /Priv 1 64kb 72kb 0kb <uarea>
UAREA /Priv 1 64kb 72kb 0kb <uarea>
UAREA /Priv 1 64kb 72kb 0kb <uarea>
MEMMAP/Priv 1 356.0mb 5.32gb 0kb <mmap>

The workaround for this issue is to set a Heap Size Limit of 512M in $AGENT_HOME/sysman/config/emd.properties:

append the String “-Xmx512m” to the line agentJavaDefines.

So the line looks like:

agentJavaDefines=-Djava.awt.headless=true -Dsun.lang.ClassLoader.allowArraySyntax=true -Dnetworkaddress.cache.ttl=1800 -DUrlTiming.UseJSSE=true -Doracle.dms.refresh.wait.time=1000 -Xmx512m

This is the bug, which is platform-independet:
Bug 9829732: AGENT 11.1.0.1 RUNNING ON OMS BOX IS CONSUMING HIGH MEMORY

Leave Comment