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Home -> Community -> Mailing Lists -> Oracle-L -> RE: Veritas Quick io
we are using the quick I/O and as well as cached quik I/O also.
I had configured this a quite long time ago I have forgotten about temp
files issues which u people are talking about.
But We did have issues by just using quick I/O cause it acts like a cooked
raw file system and hence is write intensive but not read intensive this
screws up ur database or u will see lot of sequential reads due to this
which at one time brought our database to its knees,
This caching can be done online also even when the database is running.Once
we enabled cached we were able to breadth.
u can cache each file itself or the whole file system.
the monitoring io can been done thro qiostat which will tell u about the
i/o being performed.
I can say if u are implementing this on oltp better use cached i/o or one
more way where i was reading some where was to increase ur sga to a good
amount( which i would not recommend).
i have seen the performance improvement to around 30 to 40%.
But after this i started seeing file open event very heavily i even asked on
this issue to steve adams once
-----Original Message-----
Sent: Friday, May 31, 2002 4:28 PM
To: Multiple recipients of list ORACLE-L
Kathy,
> We are using Veritas Quick IO on our Solaris Box 6500 with
> Oracle Apps 11.5.6 on 8.1.7.2 database.
>
> Right now we do not have the temp files converted to quick io
> and wonder if we should. The guy who installed Quick IO
> didn't seen to think we could but he was a pretty junior person.
In addition to the many execllent and right answers that have been given, make sure that a DBBS (DataBase Baby Sitter) doesn't inadvertly extend a Database file via RESIZE or (horrors!) enable AUTOEXTEND on any QIO based datafile! You will have to use the qiomkfile with the -e (extend by the delta) or the -r (resize to this value) options to extend/resize a datafile prior to this RESIZE action. Effectively, AUTOEXTEND cannot be used :(
A question to the others using QIO:
One question leading to another here, but I hope we can all learn from this :)
John Kanagaraj
Oracle Applications DBA
DBSoft Inc
(W): 408-970-7002
The manuals for Oracle are here: http://tahiti.oracle.com The manual for Life is here: http://www.gospelcom.net
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-- Please see the official ORACLE-L FAQ: http://www.orafaq.com -- Author: Arun Chakrapani INET: ArunC_at_1800FLOWERS.com Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051 San Diego, California -- Public Internet access / Mailing Lists -------------------------------------------------------------------- To REMOVE yourself from this mailing list, send an E-Mail message to: ListGuru_at_fatcity.com (note EXACT spelling of 'ListGuru') and in the message BODY, include a line containing: UNSUB ORACLE-L (or the name of mailing list you want to be removed from). You may also send the HELP command for other information (like subscribing).Received on Fri May 31 2002 - 15:59:36 CDT
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