> I think that would help Jason. Do you think it is something that you will

be

> able to address in the near future?

I really don't know for sure. I haven't had to do anything with BLOB column
support for a very long time so I don't exactly know it will be done.
I do recall that IBO is capable of knowing the allocated size from the
effective size of the blob buffer so it should be possible to add in the
ability for you to pre-allocate the buffer space that is needed. I just need
to make a way for you to do that.

FWIW,
Jason Wharton
CPS - Mesa AZ
http://www.ibobjects.com

----- Original Message -----
From: "Brian Dunstan" <bdunstan@...>
To: <IBObjects@yahoogroups.com>
Sent: Tuesday, April 03, 2001 5:56 PM
Subject: RE: [IBO] Large Blob Insertion


> Jason,
>
> > I think what is happening is the way it is streamed into the
> > buffer requires
> > that the memory it sits in be extended one chunk at a time. I
> > need to figure
> > out a way to allow the streaming to preallocate all the
> > memory it needs so
> > that it doesn't have to grow it in the increments.
> >
> > HTH,
>
>
> Thanks for your help,
>
> Brian
>
> > Jason Wharton
> > CPS - Mesa AZ
> > http://www.ibobjects.com
> >
> >
> > ----- Original Message -----
> > From: "Brian Dunstan" <bdunstan@...>
> > To: <ibobjects@yahoogroups.com>
> > Sent: Monday, April 02, 2001 10:11 PM
> > Subject: [IBO] Large Blob Insertion
> >
> >
> > > Hi,
> > >
> > > I am inserting blobs of about 2.5 MB an finding it VERY slow, in the
> > > vicinity of 3 minutes per blob. The funny thing is it seems
> > to be the
> > client
> > > that is slowing the process.
> > >
> > > When I post the blob the client cpu utilization goes to
> > about 100% for
> > about
> > > 3 minutes while the network remains largely inactive (I
> > have separate
> > client
> > > and server computers).
> > >
> > > It appears that most of the time is being spent in a
> > procedure called
> > > IB_ReallocMem in unit IB_Parse. Each time through it is increasing a
> > memory
> > > allocation by 4095 bytes all the way up to 11,629,632 bytes
> > which is over
> > > 2,800 iterations (nearly 4 times the size of the blob).
> > After that is done
> > > then the network and the server get busy and after a
> > further delay the
> > post
> > > is complete.
> > >
> > > I have played around with various blob segment sizes and
> > not found any
> > > dramatic differences. I am currently testing with the
> > maximum of 32,767
> > > bytes.
> > >
> > > Another funny thing is that IB Monitor is reporting a
> > segment size of
> > 65535.
> > >
> > > I am using a IBO 3.6Cf and IB 6.01. The components I am using are:
> > > TIBODatabase, TIBOQuery with RequestLive, TDataSource and a
> > TwwDBRichEdit.
> > I
> > > am using the TwwDBRichEdit to insert a OLE BMP object into
> > a RTF document.
> > >
> > > My workstation is Win 2000 SP1 with 256 MB and my server is
> > NT 4 SP 6.
> > >
> > > Am I doing something obviously wrong here, or is there some
> > parameter I
> > > should be tweaking to get dramatically better performance?
> > >
> > > Are there any native IBO controls that will allow my users
> > to edit RTF and
> > > insert OLE objects into them with reasonable performance.
> > >
> > > Thanks in advance for your thoughts.
> > >
> > > Brian
> >
> >
> >
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