Hello!
Having this error from cell alerthistory.log? Don’t panic!
Take a look in MOS: Exadata Storage Cell reports error RS-7445 [Serv MS Leaking Memory] (Doc ID 1954357.1). It’s related to Bug – RS-7445 [SERV MS LEAKING MEMORY].
The issue is a memory leak in the Java executable and affects systems running with JDK 7u51 or later versions. This is relevant for all versions in Release 11.2 to 12.1.
What happens is that MS process is consuming high memory (up to 2GB). Normally MS use around 1GB but because of the bug the memory allocated can grow upt to 2GB. You can check it as per example below:
[root@exaserver ~]# ps -feal|grep java 0 S root 16493 14737 0 80 0 - 15317 pipe_w 18:34 pts/0 00:00:00 grep java 0 S root 22310 27043 2 80 0 - 267080 futex_ 18:15 ? 00:00:27 /usr/java/default/bin/java -Xms256m -Xmx512m -XX:-UseLargePages -Djava.library.path=/opt/oracle/cell/cellsrv/lib -Ddisable.checkForUpdate=true -jar /opt/oracle/cell/oc4j/ms/j2ee/home/oc4j.jar -out /opt/oracle/cell/cellsrv/deploy/log/ms.lst -err /opt/oracle/cell/cellsrv/deploy/log/ms.err
Note that: 267080 * 4096 = 1143MB (1GB). If your number is higher than this, it indicates the presence of the bug.
In case you want to see the memory in use by MS processes, it can be seen with this command from any DB node:
[root@exaserver ~]# dcli -l root -g /opt/oracle.SupportTools/onecommand/cell_group "ps -feal|grep java| grep cellsrv|grep -v bash| awk '{mem=\$10*4096/1048576; print \$12 \" - \" mem \" Mb - \" \$15}'"
This error is ignorable, once MS will restart automatically, reseting process and memory. There is no impact on services, this is just the monitoring process. 🙂
Thanks in advance and see you!
Matheus.
