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<SPAN
class=921550323-27102002>Increasing RAM will not help.
A
faster CPU will provide an incremental improvement.
You
might be able to overclock your CPU if your motherboard is capable of
overclocking. Do not attempt this unless you know exactly what you are doing. It
could cause data loss or it might even damage your hardware in some extreme
cases.
<SPAN
class=921550323-27102002>
By far
the biggest improvement is to change the way you optimize.
<SPAN
class=921550323-27102002>
You
could try optimizing fewer parameters concurrently. So instead of running one
big optimization, you could run multiple smaller optimizations on fewer
parameters.
<SPAN
class=921550323-27102002>
Also
you can start with larger step sizes to find the general area of good
performance. Then run a second optimization with fine-grained steps within a
smaller range.
<SPAN
class=921550323-27102002>
<SPAN
class=921550323-27102002>-Steve
<SPAN
class=921550323-27102002>
<FONT face=Tahoma
size=2>-----Original Message-----From: giggollo99
[mailto:giggollo@xxxx]Sent: Sunday, October 27, 2002 3:25
PMTo: amibroker@xxxxxxxxxxxxxxxSubject: [amibroker]
Improving performance of large optimizationsHi
everyone, This question is directed to Tomasz and to anyone who has
experience in doing large optimizations.I am attempting to perform
quite large optimizations with a large amount of intraday data. I have a
Windows XP OS, 1.2 GHz Athlon CPU and 512MB SDRAM. The optimizations
are of the order of 15,000 optimization steps over 50,000 intraday bars.
I would like to know what upgrades you believe will allow me to do
these optimizations faster. Which would in your experience enhance
performance more, an increase in RAM or CPU speed?By monitoring
CPU utilization and RAM utilization during these optimizations, I noticed
that Amibroker uses 100% of CPU ("CPU USAGE" parameter in Windows Task
Manager/Performance Tab) but only about 60% of the RAM ("PF Usage" and
"Commit charge" and "Physical Memory available" in Windows Task
Manager/Performance Tab). Those are the figures I see but I will defer
their interpretation to the experts which I am not.Any other
suggestions that could enhance the time required to perform these large
optimizations? I know I could increase the step size in the optimize
statements but I would like to optimize on a fine grain. Any help
is *much* appreciated. Thanks.Post
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