We are finding there is quite a performance hit when our application is running on a 64 bit OS, either
Windows 2008 Server or Windows 7.  We have performed the usual checks to ensure the virus-scan is not interfering and the performance options set to 'applications' versus background services.  We thought it might be the newer applications so we tested on Windows 7 32 bit. That OS gives us similar speeds we receive on XP 32 bit.

We realize the emulation through WOW64 would have some impact but sometimes we are seeing 2-3 times slower than on XP-32 processing times.  Yet on Vista Ultimate 64 bit, the performance hit appeared to be around 10% which was acceptable.  So the big question, has anyone else experienced similar performance degradation on the 64 bit processors and have you been able to find any ways of improving performance through configuration changes?

DBISAM 4.29 B4
PC's tested had identical hardware ie 3GHZ 7200 rpm drives.
Windows 2008 Server X64 dual processor Xeon 3.33 GHX with raided high speed drives so quite a mean machine.
Just OS, no other emulations.   Any ideas would be helpful.  Thanks.

Donat

We have discovered on setting on Windows 7 X64 OS workstations that causes this .. its the power setting
that was set to "Power Save" vs "Balanced".  The CPU doesn't get to the proper level of utilization which drastically slows down Engine processing.  We're now checking on the servers for similar settings.  Thought we'd share the
findings in case anyone else hits this item.

William,

<< We have discovered on setting on Windows 7 X64 OS workstations that
causes this .. its the power setting that was set to "Power Save" vs
"Balanced".  The CPU doesn't get to the proper level of utilization which
drastically slows down Engine processing.  We're now checking on the servers
for similar settings.  Thought we'd share the findings in case anyone else
hits this item. >>

Thanks for the update, that's valuable information.

--
Tim Young
Elevate Software
www.elevatesoft.com

I would just like to concur with this finding.

We have a 64 bit server & it was regularly hanging for 1- 2 seconds on a whole variety of operations (including DBISAM server data-requests) ... in the end it was down to a power setting, which basically seemed to be turning off parts of the multi-core processor when it thought they were not in use.

These then had to restart when suddenly "hit" with a data request the restart took up the time.