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Mr Siddharth
I had similar problems too. In the database settings, I had set
45000 bars. Once the database crossed the 45000 bars, system
became very slow. After I deleted some of the data, it became
alright. I do not know if the data volume is the exact cause.
Just I thought of sharing this info with you.
perumal
-- In amibroker@xxxxxxxxxxxxxxx, "sidhartha70" <sidhartha70@xxx>
wrote:
>
> Thanks Tomasz, but I'm as sure as I can be it's not my formula's...
> I have checked them before, but I checked again on live charts as
you
> suggested... my slowest formula is about 0.05sec and that uses
about
> three plotforeign() statements.
>
> I have found that symbol linking of charts seems to cause them to
slow
> down... Would that be correct...? And when I say 'slow down' I
don't
> mean chart re-draws... more general operation, like scrolling on
> charts, cursor clicks, menu pop up & right click menus etc...
>
>
>
> --- In amibroker@xxxxxxxxxxxxxxx, "Tomasz Janeczko" <groups@>
wrote:
> >
> > Hello,
> >
> > Chart refresh of ZERO means to refresh as often as CPU allows
> > so it inherently leads to higher load. That is not degradation
> however but
> > rather speed up as chart are refreshed more often.
> >
> > However if on single core you are getting more than 70% CPU load
average
> > it may mean that your formulas are probably not fine-tuned for
> real-time performance.
> >
> > EVERY formula used for real time trading should execute below 0.1
> second.
> >
> > You should display the timing of your chart
> > (Tools->Preferences->Miscellaneous "Display chart timing).
> > If your formula execution takes ANYTHING more than 0.1 sec to
execute
> > it means that the formula you are using is written wrong
> > (inefficiently).
> > Formulas shipped with AB execute in less than 0.01 sec.
> >
> > Run
> > AFL Editor, Tools->Check and profile to find bottleneck of your
> formulas.
> >
> >
> > Best regards,
> > Tomasz Janeczko
> > amibroker.com
> > ----- Original Message -----
> > From: "sidhartha70" <sidhartha70@>
> > To: <amibroker@xxxxxxxxxxxxxxx>
> > Sent: Tuesday, June 10, 2008 1:18 AM
> > Subject: [amibroker] Re: Tracking down performance degredation
in AB
> >
> >
> > > Already using 5.10 Tomasz.
> > >
> > > --- In amibroker@xxxxxxxxxxxxxxx, "Tomasz Janeczko" <groups@>
wrote:
> > >>
> > >> Which version are you using?
> > >> You should upgrade to 5.10 for best results.
> > >>
> > >> Best regards,
> > >> Tomasz Janeczko
> > >> amibroker.com
> > >> ----- Original Message -----
> > >> From: "sidhartha70" <sidhartha70@>
> > >> To: <amibroker@xxxxxxxxxxxxxxx>
> > >> Sent: Monday, June 09, 2008 9:29 PM
> > >> Subject: [amibroker] Re: Tracking down performance
degredation in AB
> > >>
> > >>
> > >> > Actually, I think I just tracked it down... seems obvious
now. I
> > >> > recently changed the 'Intraday" refresh interval in
Preferences
> from 3
> > >> > secs to zero...
> > >> >
> > >> > However, I only have about 4 symbols feeding live from IQ
> Feed... and
> > >> > I'm running a beast of a PC... and the fasted internet
connection
> > >> > available in the UK... the net effect on my processor
useage seems
> > >> > negligable... so I'm kinda surprised that it would degrade
> performance
> > >> > so much...
> > >> >
> > >> > Anyone else experienced this...? Should I be suprised or
maybe
> there
> > >> > is something else amiss...??
> > >> >
> > >> > Many Thanks
> > >> >
> > >> > --- In amibroker@xxxxxxxxxxxxxxx, "sidhartha70"
<sidhartha70@>
> wrote:
> > >> >>
> > >> >> HI All,
> > >> >>
> > >> >> Been using AB for a couple of months now... I seem to have
> noticed a
> > >> >> performance degredation on the AB's use the past couple of
days. I
> > >> >> can't see that I've added antyhing in particular that
would cause
> > > this.
> > >> >>
> > >> >> Any ideas towards tracking down performance degredation in
AB...?
> > >> >>
> > >> >> Thanks
> > >> >>
> > >> >
> > >> >
> > >> >
> > >> > ------------------------------------
> > >> >
> > >> > Please note that this group is for discussion between users
only.
> > >> >
> > >> > To get support from AmiBroker please send an e-mail
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> > >> > SUPPORT {at} amibroker.com
> > >> >
> > >> > For NEW RELEASE ANNOUNCEMENTS and other news always check
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> > >> > http://www.amibroker.com/devlog/
> > >> >
> > >> > For other support material please check also:
> > >> > http://www.amibroker.com/support.html
> > >> > Yahoo! Groups Links
> > >> >
> > >> >
> > >> >
> > >>
> > >
> > >
> > >
> > > ------------------------------------
> > >
> > > Please note that this group is for discussion between users
only.
> > >
> > > To get support from AmiBroker please send an e-mail directly
to
> > > SUPPORT {at} amibroker.com
> > >
> > > For NEW RELEASE ANNOUNCEMENTS and other news always check
DEVLOG:
> > > http://www.amibroker.com/devlog/
> > >
> > > For other support material please check also:
> > > http://www.amibroker.com/support.html
> > > Yahoo! Groups Links
> > >
> > >
> > >
> >
>
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