| 8i slow after 8.05 migration [message #74243] |
Mon, 18 October 2004 19:26  |
saustin
Messages: 43
Registered: June 2003
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Member |
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- Hi,
After migrating an 8.05 db to 8i on an NT box the performance is noticeably slower !
Did change the db_files = 400 (from 1200) and increased the #db_block_buffers = 12800 to db_block_buffers = 25600
but doind a quick toad dba <A class=iAs style="COLOR: darkgreen; BORDER-BOTTOM: darkgreen 1px solid; BACKGROUND-COLOR: transparent; TEXT-DECORATION: underline" href="http://www.tek-tips.com/viewthread.cfm?qid=936150#" target=_blank>server[/url] stat's still shows that the number of db_files may still be too high. How are most of you determining what the optimum size is ? Does this really make a huge difference in 8i (versus the old 8.05) ?
<A class=iAs style="COLOR: darkgreen; BORDER-BOTTOM: darkgreen 1px solid; BACKGROUND-COLOR: transparent; TEXT-DECORATION: underline" href="http://www.tek-tips.com/viewthread.cfm?qid=936150#" target=_blank>Linux[/url] conversion will take place in January but do need to limp along until then.
Any suggestions (or moral support) appreciated !
Thanks, Steve. -
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| Re: 8i slow after 8.05 migration [message #74244 is a reply to message #74243] |
Tue, 19 October 2004 03:34  |
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Mahesh Rajendran
Messages: 10708
Registered: March 2002
Location: oracleDocoVille
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Senior Member
Account Moderator |
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>>After migrating an 8.05 db to 8i on an NT box the >>performance is noticeably slower !
how did you migrate? ( which method, details?).
which performance are you mentioning here?
Overall database performance or a set of queries?
Do you have a statspack report or any other metric to compare before and after the upgrade?
is there is change in the block size?
is there any change in initsid.ora?
Db_files has nothing to do with performance.
and Increasing db_block_buffers is NOT always required.
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