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Hello,
Good news is that according to IQFeed documentation with their latest
release
they removed some limitations regarding API (necessity to run 32 bit
components)
so probably it will be possible in near future to have 64-bit IQFeed
plugin implemented.
I can not give you release dates for that, just a "ray of hope" :-)
Best regards,
Tomasz Janeczko
amibroker.com
On 2009-12-16 09:14, etoketrader wrote:
> Hi,
>
> I agree with Tomasz that the inbuilt cache memory is faster than a RAM Disk, but there is the size limit problem. 64 bit AB resolves this issue, but unfortunately the IQFeed plugin I use does not work with this setup, so for me a RAM Disk and 32bit AB was the only choice.
>
> I've been using this setup for several months now and I won't go back until IQFeed Plugin will work with 64bit systems.
>
> My settings for "In Memory Cache Size" is 11 and max. Megabytes is 850.
>
> I run a 7GB+ DB on a 16GB RAM machine for which 10GB is a RAM Disk.
>
> When I ran the original tests I had experienced 4-6X speed improvement.
>
> I might have got this improvement because I might have a slow harddisk to start with. Crystalmark shows something like 1900MB/s on the RAM Disk vs 86GB/s sequential read on my HDD.
>
> Regards,
> eToke
>
>
> --- In amibroker@xxxxxxxxxxxxxxx, "smw311"<steve@xxx> wrote:
>
>>
>> Thanks for the quick reply Tomasz! I totally agree the AB in-memory cache is the way to go except that it's currently limited to 4Gb. The RAM disk is a work around until this limitation is lifted.
>>
>> regards,
>> Steve
>>
>>
>> --- In amibroker@xxxxxxxxxxxxxxx, Tomasz Janeczko<groups@> wrote:
>>
>>> Hello,
>>>
>>> I don't quite why you would want to use RAM DISK as a "virtual drive"
>>> when you can use AmiBroker in-built cache that is always going to be
>>> faster than
>>> RAM disk and would use less memory. With RAM disk same data are in fact
>>> twice in RAM once in virtual disk and second time in AB internal cache.
>>>
>>> So don't use RAM disk, use AB in-memory cache instead.
>>>
>>> Best regards,
>>> Tomasz Janeczko
>>> amibroker.com
>>>
>>> On 2009-12-15 21:28, smw311 wrote:
>>>
>>>> Since I still have not been able to get Amibroker 64 on Win7 to run larger databases in memory I decided to try a RAM disk. I just created a 6Gb one and loaded my 5.9Gb database on it. I get slightly less than a 2X speed up. Was hoping for significantly more. :( I remember reading posts in this forum that others have seen 4X - 6X increase. I tried running with and with out a swap file but that does not seem to make a big difference.
>>>>
>>>> Any thoughts on what else to do to make it go faster would be really appreciated!
>>>>
>>>> Thanks
>>>> Steve
>>>>
>>>>
>>>>
>>>>
>>>> ------------------------------------
>>>>
>>>> **** IMPORTANT PLEASE READ ****
>>>> This group is for the discussion between users only.
>>>> This is *NOT* technical support channel.
>>>>
>>>> TO GET TECHNICAL SUPPORT send an e-mail directly to
>>>> SUPPORT {at} amibroker.com
>>>>
>>>> TO SUBMIT SUGGESTIONS please use FEEDBACK CENTER at
>>>> http://www.amibroker.com/feedback/
>>>> (submissions sent via other channels won't be considered)
>>>>
>>>> For NEW RELEASE ANNOUNCEMENTS and other news always check DEVLOG:
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>>>>
>>>> Yahoo! Groups Links
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>
>>
>
>
>
> ------------------------------------
>
> **** IMPORTANT PLEASE READ ****
> This group is for the discussion between users only.
> This is *NOT* technical support channel.
>
> TO GET TECHNICAL SUPPORT send an e-mail directly to
> SUPPORT {at} amibroker.com
>
> TO SUBMIT SUGGESTIONS please use FEEDBACK CENTER at
> http://www.amibroker.com/feedback/
> (submissions sent via other channels won't be considered)
>
> For NEW RELEASE ANNOUNCEMENTS and other news always check DEVLOG:
> http://www.amibroker.com/devlog/
>
> Yahoo! Groups Links
>
>
>
>
>
------------------------------------
**** IMPORTANT PLEASE READ ****
This group is for the discussion between users only.
This is *NOT* technical support channel.
TO GET TECHNICAL SUPPORT send an e-mail directly to
SUPPORT {at} amibroker.com
TO SUBMIT SUGGESTIONS please use FEEDBACK CENTER at
http://www.amibroker.com/feedback/
(submissions sent via other channels won't be considered)
For NEW RELEASE ANNOUNCEMENTS and other news always check DEVLOG:
http://www.amibroker.com/devlog/
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