| I\O improvment [message #424230] |
Thu, 01 October 2009 00:04  |
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Hi everybody,
I am interested in "noatime" mount parameter for ext2 and ext3 file systems.
Does anybody know if it would really improve I\O?
Thanks
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| Re: I\O improvment [message #425974 is a reply to message #425969] |
Tue, 13 October 2009 08:10  |
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Michel Cadot wrote on Tue, 13 October 2009 16:48You should post this in Linux forum instead of an Oracle one.
Regards
Michel
Hello,
I don't agree with you. Because operating system doesn't update the last access time for directories and files mounted under "noatime" mount point which translates into radically reduce total I/O. Linux offers this option to improve I/O for databases. That's why I tested it on RHEL5 with Oracle 10.2.0.4 but I didn't find any significant benefits of it.
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| Re: I\O improvment [message #426060 is a reply to message #426031] |
Wed, 14 October 2009 00:46 |
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ebrian wrote on Wed, 14 October 2009 03:55Most all Linux tuning guides (and many Oracle tuning references) recommend setting this for applicable mount points and the link tahpush posted above does indicate one poster's performance gains, however YMMV based on your testing and disk setup.
Hello ebrian
Thank you for attention to my question. I know that "noatime" mount option improves I/O by avoiding writes. But as I see people rarely care about the atime of an Oracle tablespace.
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