How to make all available CPU resource to Perl/MySQL in Win XP?

[evi...@gmail.com]

Hi

Sorry that this isn't really a 'Perl' problem, although there may be a
Perl solution...

I am developing a Perl & MySQL application - the problem I have is
that the program takes a while to run and yet when I look at the CPU
utilisation (with SysInternals Process Explorer) I see that the
programs Perl.exe & mysqld-nt.exe are barely using 2% of CPU each.

I have used the SysInternals Process Explorer's "Set Priority" feature
& set both .exe's to Realtime24 but this had negligible effect.

How can I force the .exe's to make better use of the CPU?

Thanks for any helpful suggestions

NJH

[Joost Diepenmaat]

"evi...@gmail.com" <evi...@gmail.com> writes:

> I have used the SysInternals Process Explorer's "Set Priority" feature
> & set both .exe's to Realtime24 but this had negligible effect.
>
> How can I force the .exe's to make better use of the CPU?

You want a different algorithm so that you're not waiting on network IO
/ disc IO / other system calls / file locks / database locks.

--
Joost Diepenmaat | blog: http://joost.zeekat.nl/ | work: http://zeekat.nl/

[evi...@gmail.com]

On 9 Oct, 09:53, Joost Diepenmaat <jo...@zeekat.nl> wrote:

Can you recommend some way of detecting these 'gating processes' or
'locks'?

There is no Network IO & minimal Disk IO required by my program &
there shouldn't be any files locked as it's all single user & local
resources.

When I look at Process Explorer I can't see that any other process
hogging the CPU/RAM etc.

Thanks

[bugbear]

Interesting - I wonder if there is a LOT of overhead
in the communication BETWEEN your two processes?

BugBear

[evi...@gmail.com]

On 9 Oct, 11:03, bugbear <bugbear@trim_papermule.co.uk_trim> wrote:

Hi Bugbear - do you have any suggestions about how I could determine/
measure the overhead required between Perl & MySQL?

[xho...@gmail.com]

"evi...@gmail.com" <evi...@gmail.com> wrote:
> >
> > Interesting - I wonder if there is a LOT of overhead
> > in the communication BETWEEN your two processes?
> >
>

> Hi Bugbear - do you have any suggestions about how I could determine/
> measure the overhead required between Perl & MySQL?

$dbh->ping() foreach 1..1e5;

I can do about 5000 pings per second.

Xho

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[Peter J. Holzer]

On 2008-10-09 09:49, evi...@gmail.com <evi...@gmail.com> wrote:
> On 9 Oct, 09:53, Joost Diepenmaat <jo...@zeekat.nl> wrote:
>> "evil...@gmail.com" <evil...@gmail.com> writes:
>> > I have used the SysInternals Process Explorer's "Set Priority" feature
>> > & set both .exe's to Realtime24 but this had negligible effect.
>>
>> > How can I force the .exe's to make better use of the CPU?
>>
>> You want a different algorithm so that you're not waiting on network IO
>> / disc IO / other system calls / file locks / database locks.
>

> Can you recommend some way of detecting these 'gating processes'

What are 'gating processes'?

> or 'locks'?

See chapter 7 of the MySQL manual.

> There is no Network IO & minimal Disk IO required by my program &

How did you determine that there is "minimal disk I/O"? Disk I/O is
frequently the bottleneck of database applications. How much time does
Mysql spend in disk I/O?

hp