sar is not capturing logs in Linux

 sar is not capturing logs in Linux

sar (System Activity Report) is monitoring tools which monitors system performance like CPU/mem/IO utilization etc.

The sar captures data on every 10mins interval and the log files are getting stored under /var/log/sa. We can see files generated on every day basis and the log rotaion happens depending on cron set under /etc/cron.d/sysstat.

Supoose the log files are not getting generated in the /var/log/sa directory.

Check the sysstat service status and if it is not running then try to restart the service.

#service sysstat status --> to check service status

#service sysstat status --> to restart service

or

#sysctl restart sysstat

Regards,

Kiran Jaddhav

How to find serial number of cell nodes - Exadata or SSC

 How to find serial number of cell nodes:

In Exadata box or solaris supercluster (SSC) we may have multiple storage cell nodes attached. 

If we have 10-12 storage cells nodes then instead of login to each and every cells we can find out the serial number by using below command:

1. In Solaris super cluster:

#dcli -g /opt/oracle.supercluster/bin/cell_group -l root "dmidecode -s system-serial-number"

where # cat /opt/oracle.supercluster/bin/cell_group  --> will list number of cell nodes attached to the SSC machine

2. In Exadata servers:

#dcli -g /opt/oracle.SupportTools/onecommand/cell_group -l root "dmidecode -s system-serial-number"

where # cat /opt/oracle.SupportTools/onecommand/cell_group  --> will list number of cell nodes attached to the Exadata machine

Thank U

- Kiiran B Jaadhav