To flush DNS cache? Easy like that:
1) Flush DNS – “Auto”
service nscd restart
2) Flush DNS – “Manual”
service nscd stop
service nscd start
1) Flush DNS
For quick referece: http://www.cyberciti.biz/faq/rhel-debian-ubuntu-flush-clear-dns-cache/
Yesterday a colegue asked me about “enq: TT – contention” event on his session that is adding a a datafile in a tablespace wich run out of space in a 126.96.36.199 Database.
I’ve faced this situation another time and decided to document it.
Oracle refer Bug 8332021 : CANNOT ADD A DF WHEN SESSIONS ARE REPORTING ORA-1653 ON 188.8.131.52 for this situation.
The pointing solutions are:
– “Apply Patch 8332021”
– “Alternatively, you can upgrade to 184.108.40.206 or higher as the patch is included in the 220.127.116.11 patch set.”
The not documented workaround (just for you, by Matheus :D) is:
– Cancel session adding datafile.
– Extend any datafile to resume sessions waiting (in resumable state).
– Readd datafile.
This extend action relieves the blocks and will allow you to add the datafile.