From: DAUBIGNE Sebastien - BOR (SDaubigne@bordeaux-bersol.sema.slb.com)
Date: Mon Dec 22 2003 - 14:56:37 EST
Hi,
We recently upgraded our E6500 (18 CPU, 25 Gb) from Solaris 2.6 (32 bits) to
Solaris 8 (64 bits).
This was not really an upgrade : we just reinstalled Solaris 8 and all other
products (VxVM, VxFS, etc.) on a separate disk set using a spare E450, and
ufsrestored + rebooted it on the E6500, just importing the data.
We though, according to Sun claims
(http://wwws.sun.com/software/solaris/programs/upgradingtosolaris8.html
<http://wwws.sun.com/software/solaris/programs/upgradingtosolaris8.html> ),
that we would get a performance boost.
Unfortunately, our applications are performing worse than with Solaris 2.6 :
- Oracle (8.1.7.4, 32-bits) took a 30% decrease in performance,
although we didn't change anything in the Oracle config/data. We tried to
run 64-bits Oracle but it was even worse (-50%), although we increased the
Oracle buffers (SGA).
- Batch jobs (COBOL programs and a sort tool called "Syncsort")
perform slightly worse (-10%).
I can't see any obvious bottleneck using the standard tools (iostat, vmstat,
iostat) : CPU usage didn't increase, no paging to swap, I/O services times
are quite similar with 2.6 figures.
We left the kernel parameters at their 2.6 values, except for some
parameters that became obsolete with Sol8 (priority_paging, some IPCs...).
Here are some of the values (I removed IPCs and device-specifics) :
set fastscan=131072
set handspreadpages=131072
set maxpgio=65536
set maxphys=1048576
set vxio:vol_maxio=2048
Is there any tuning parameter or anything else I could have miss, which are
recommended when upgrading from Sol2.6 to Sol8 ?
Do you think that running the 64-bits kernel with an E6500 is a bad idea
(though it is the default) ? Should we consider running the 32-bits kernel ?
Thanks for your help.
--- Sebastien DAUBIGNE sdaubigne@bordeaux-bersol.sema.slb.com <mailto:sdaubigne@bordeaux-bersol.sema.slb.com> - (+33)5.57.26.56.36 SchlumbergerSema - SGS/DWH/Pessac _______________________________________________ sunmanagers mailing list sunmanagers@sunmanagers.org http://www.sunmanagers.org/mailman/listinfo/sunmanagers
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