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Tomasz, I use qpFeed not IQfeed but have had a problem forever that
is somewhat the same. There is NO problem when just updating a few
symbols continuously-but- if I try to keep about 75-100 symbols
updating, the quotes come in slower and slower. The people at the
quote provider say they get no complaints and there is no problems
sending out the quotes. Can you try to set up a 1 minute db with
about 100 tickers, the layout has 5 windows all symbol-linked (1min,
2min, 5min, 15min and daily). Use any simple indicator with the
price (ie 10 bar MA). Run any simple AA to cause all 100 tickers to
update. Then see how long the symbols take to get up to date and
more important, come back a few hours later and see the time of the
last bar compared to the time on your clock.. has it fallen behind?
You can just leave the original symbol displayed- no need to change
symbols after the first change after running the AA. I know we have
discussed this before- but I wonder if you have done my little
experiment yourself?
Thanks again and I remain convinced AB is the best by far.
Dan
--- In amibroker@xxxxxxxxxxxxxxx, "Tomasz Janeczko" <groups@xxx>
wrote:
>
> It should take less. Maybe you have firewall problems.
> I checked and it backfills with speed of about 500+ bars per
second, so
> backfill of 1000 bars of single symbol using IQFeed takes about 2
seconds on my end (2mbps DSL)
>
> Indeed it used to be faster in the past (3 or 4 times faster from
memory), so I guess some limits were added by IQFeed recently.
>
> Best regards,
> Tomasz Janeczko
> amibroker.com
> ----- Original Message -----
> From: "przemyslawuk" <przemyslawuk@xxx>
> To: <amibroker@xxxxxxxxxxxxxxx>
> Sent: Wednesday, November 05, 2008 10:52 PM
> Subject: [amibroker] Re: "SLOW" backfill and delay with IQFeed
>
>
> > Tomasz, I was trying to use AB with a minimum amount of data.
> > Currently my database settings are : 1min/1100bars/32kb per
symbol.
> > So, 60 symbols*32kb=1.8Mb
> > I don't understand why intraday scan with "wait for backfil" takes
> > almost 1 hour. I understand that there must be some additional
> > "negotiation" -request the symbol, wait for data....etc. but even
so
> > it should not take that much time. I measured my connection speed
> > using "speed meter" on 2wire.com website and it shows more than
1MB/s.
> >
> >
> > Am I right that streaming 100 symbols is equivalent to avg
internet
> > transfer of about 10kb/s at the most?
> >
> > And, Should the backfill of 100 symbols =3.2Mb be a matter of a
few
> > seconds with internet speed of 1Mb/s (measured)?
> >
> > Windows task manager shows 38% CPU (40/60 between IQ and AB) and
LESS
> > than 1% internet bandwidth usage -- WHY is it not using the entire
> > bandwidth available?????????????????
> >
> > Another thing I don't understand is, why with the above numbers my
> > Core2 Duo PC is nonresponsive when watching 4 charts ??????
> >
> > I have a separate internet connection for AB and my trading
platform
> > because when I run intraday scans AB can cause other applications
> > running on the same connection to loose the connection. And I
have the
> > fastest connection the money can buy in my area.
> >
> > I was complaining to IQFeed, we spend an hour online running tests
> > and they say that everything looks ok.
> >
> > I saw posts from other AB users claiming that they have 8 charts
on
> > the screen on a PC two generations older than mine. I was wonder
how
> > do they manage to trade.
> > It is my 3rd PC and I always get the same problems. I am not
> > complaining here about AB because it is still the best program in
my
> > opinion, but I have never seen anyone else using it, so I try to
get
> > some feedback whether I just complain about things not knowing
that it
> > is the way they should be.
> >
> > Could someone else share their experience with AB?
> >
> >
> >
> > ------------------------------------
> >
> > **** IMPORTANT ****
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> > This is *NOT* technical support channel.
> >
> > *********************
> > TO GET TECHNICAL SUPPORT from AmiBroker please send an e-mail
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> > *********************
> >
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> >
> > *********************************
> > Yahoo! Groups Links
> >
> >
> >
>
------------------------------------
**** IMPORTANT ****
This group is for the discussion between users only.
This is *NOT* technical support channel.
*********************
TO GET TECHNICAL SUPPORT from AmiBroker please send an e-mail directly to
SUPPORT {at} amibroker.com
*********************
For NEW RELEASE ANNOUNCEMENTS and other news always check DEVLOG:
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For other support material please check also:
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