AIM - Performance Tuning on O.S. & Veritas
SETUP -
DB Server :-
E3500 m/c = 2 CPUs , 2 GB RAM
Solaris 8 on ORA 8.1.7.1
Database on VXFS Filesystem with Quick I/O Installed .
RAID 0 with 64 K Stripe Size using VXVM & 8 K VXFS Block Size
Software RAID Configured as H/W RAID NOT Supported by the A5200 Storage
Box.
db_block_size=8 K
Benchmarking Run Done on a Banking Application .
5000 Transactions Distributed Between 200 Concurrent User Processes are
Executed
Transactions' Mix = OLTP & Batch Runs in the ratio 70:30 percent
respectively
/etc/vfstab :-
/dev/vx/dsk/rootdg/vol01 /dev/vx/rdsk/rootdg/vol01 /in1/db1
vxfs 3 yes mincache=direct,convosync=direct
/dev/vx/dsk/rootdg/vol02 /dev/vx/rdsk/rootdg/vol02 /in1/db2
vxfs 3 yes mincache=direct,convosync=direct
/dev/vx/dsk/rootdg/vol03 /dev/vx/rdsk/rootdg/vol03 /in1/db3
vxfs 3 yes mincache=direct,convosync=direct
/etc/vx/tunefs :-
/dev/vx/dsk/rootdg/vol01 qio_cache_enable=1
/dev/vx/dsk/rootdg/vol02 qio_cache_enable=1
/dev/vx/dsk/rootdg/vol03 qio_cache_enable=1
Qs. What Parameters Can be additionally Set on the O.S. & Veritas to
Give a performance Benefit
Qs. Should the Tempfiles Also be Converted to Quick I/O (QIO) &
Thereafter De-Sparsed ?
NOTE - After Converting the Existing Database's Files to Quick I/O
(Running mkqio.sh) , NO performance benefit was Observed between the
NON-QIO & QIO Converted Database in the Benchmark Runs .
Upon Setting the parameters mincache=direct,convosync=direct in
/etc/vfstab & qio_cache_enable=1 in /etc/vx/tunefstab Files for the VXFS
Filesyatems Containing the Database , Some Business Types of
Transactions promarily Batch in Nature Improved Distinctly Though the
OLTP Trans, Types Continued to perform at the Same Rate
--
Please see the official ORACLE-L FAQ: http://www.orafaq.com
--
Author: VIVEK_SHARMA
INET: [EMAIL PROTECTED]
Fat City Network Services -- (858) 538-5051 FAX: (858) 538-5051
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