I create diskgroups for RAC node using ASMCA on 11g but the diskgroup fail to create due to timeouts by VKTM background process and it took almost 3 days for the diskgroup
The thing is even after 3 days, ASMCA still spinning the gears and it pretty frustates.
I checked each and every corner of the ASM,ASMCA,database and clusterware logs but still it is like chasing the tail in a loop
Always give appropriate value to kernel parameters which indirectly affects the performance of lot of tasks performed in future
[oracle@exdbadm01 dbs]$ cat /etc/sysctl.conf|grep net.core net.core.rmem_default=262144 net.core.rmem_max=8388608 net.core.wmem_default=262144 net.core.wmem_max=2097152
Finally diskgroups got created with in fraction of seconds which really shocked .
As i try to create diskgroups by rebuilding the whole clusterware and database setup almost for 10 to 15 times
All the time it took more than 2 days and i could find timeout and connection retry errors repeatedly
Connect retry: sleeping for 2 seconds, connect attempt 3130 out of maximum 7 attempts
There were lot of vktm hang messages continuously without any trace.Atlast after applying the recommended changes from DBESP blog,the issue got resolved and diskgroups created very fast.