| AIX and CIO (concurrent I/O) [message #269347] |
Fri, 21 September 2007 15:15  |
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Messages: 2
Registered: September 2007
Location: MA - USA
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Junior Member |
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Hi,
I have questions regarding AIX and cio with Oracle.
AIX 5.2 ML05
Oracle 9.2.0.8 (CRM DB)
I mounted the data, redo, and temp filesystems with the cio mount option.
The filesystemio_option is set to setall.
Using truss, I only see files opened with O_DYSNC instead of the O_CIO flag and the only read size is 8192.
Using lsof:
oracle 26280098 oracle 25u VREG R,W,DSYN,LG,0x80;CX,BR 41,1 512515 4043309197 /crmdevldata1 (/dev/crmdevldata1lv)
It does not look like Oracle is using cio at all - how can I tell if cio is in use properly?
Are there any other tuning recommedations with cio?
Any help is greatly appreciated!
Thank you
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| Re: AIX and CIO (concurrent I/O) [message #270096 is a reply to message #269394] |
Tue, 25 September 2007 13:41  |
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Messages: 2
Registered: September 2007
Location: MA - USA
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Junior Member |
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I have not wrote a program to see if it uses CIO.
I would like to know how to verify if Oracle is using cio properly (as it is configured to do ) via truss or trace or lsof or something else.
Any ideas?
Thank you
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