OBIEE 12c Slow Startup and Shutdown within Linux
When the entropy pool is low, then the OS needs to add bytes back
to the pool. This can be a blocking operation and cause hangs or slowness when
performing such tasks such as using nodemanger, starting Weblogic, etc
- Check the default system
entropy pool
$ cat /proc/sys/kernel/random/poolsize
4096
4096
- Check the currently
available entropy pool
$ cat
/proc/sys/kernel/random/entropy_avail
396
396
If below 500 then it will be slow.....
How can I add to the entropy pool to resolve this issue?
You Can Download rngd if not installed using Yum install
rngd -r
/dev/urandom -o /dev/random -b
You can configure it permanently by adding the following to /etc/sysconfig/rngd :
EXTRAOPTIONS="-i
-r /dev/urandom -o /dev/random -b -t 60 -W 4096"
This will generate to the entropy pool ever 60 seconds until the size is 4096. You can change to the desired time and size with the '-t' (time) and '-W' (size) parameters.
Conclusion
With the entropy settings in place it almost halfs the time OBIEE takes to Start and Shutdown so convinient when your changing weblogic or EM settings.
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