OAM 11.1.2.3.3 HIGH CPU Utilization (Doc ID 2390130.1)

Last updated on AUGUST 31, 2023

Applies to:

Symptoms

On : 11.1.2.3.3 version

During jmeter load test ,  soap UI requests. 30 Authentication and 30 authorizations per second.
Result in OAM high CPU

TOP output(top -H -p OAM-PID ) shows 9 threads having high cpu. All are for Coherence

top - 02:28:10 up 3:13, 16 users, load average: 7.81, 4.79, 3.26
Tasks: 181 total, 7 running, 174 sleeping, 0 stopped, 0 zombie
Cpu(s): 89.6%us, 5.1%sy, 0.0%ni, 5.0%id, 0.0%wa, 0.0%hi, 0.2%si, 0.0%st
Mem: 32684620k total, 31717124k used, 967496k free, 108448k buffers
Swap: 18873336k total, 48k used, 18873288k free, 20863348k cached

PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
17323 <USER_ID> 20 0 16.8g 7.4g 40m R 90.1 23.7 3:12.39 java
17322 <USER_ID>20 0 16.8g 7.4g 40m R 88.4 23.7 3:12.28 java
17324 <USER_ID>20 0 16.8g 7.4g 40m S 88.1 23.7 3:12.85 java
17320 <USER_ID>20 0 16.8g 7.4g 40m R 87.8 23.7 3:13.00 java
17327<USER_ID> 20 0 16.8g 7.4g 40m R 87.4 23.7 3:13.20 java
17321 <USER_ID>20 0 16.8g 7.4g 40m R 85.8 23.7 3:12.94 java
17325 <USER_ID>20 0 16.8g 7.4g 40m S 83.8 23.7 3:12.74 java
17326<USER_ID> 20 0 16.8g 7.4g 40m R 81.4 23.7 3:09.83 java

bash-3.2$ grep -i "43aa" *
"DistributedCacheWorker:2" daemon prio=10 tid=0x00007efe94008000 nid=0x43aa runnable [0x00007efe30bad000]
"DistributedCacheWorker:2" daemon prio=10 tid=0x00007efe94008000 nid=0x43aa runnable [0x00007efe30bad000]
"DistributedCacheWorker:2" daemon prio=10 tid=0x00007efe94008000 nid=0x43aa runnable [0x00007efe30bae000]
"DistributedCacheWorker:2" daemon prio=10 tid=0x00007efe94008000 nid=0x43aa runnable [0x00007efe30bae000]
"DistributedCacheWorker:2" daemon prio=10 tid=0x00007efe94008000 nid=0x43aa runnable [0x00007efe30bad000]

Changes

 Moved the env from rackspace cloud to AWS cloud

Cause

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