Re: IDS chunk size

If you use big chunks far above 2 GB, make sure that you have KIO running. If your OS does not support KIO, your performance will suffer on big chunks using AIO-VPs. gerd Jairo Gubler wrote: >ARVIND PATKAR escreveu: > > > >>Hi all, >> >>We would like to know about the chunk size, which we can set for the database stripping. Example is as follows: >> >>Database size: 200GB (RAW DISK mode) >>Stripped Data size: 2GB >> >>That means, 100 stripes of 2GB, which will become 200GB Database. >> >>In IDS 9.x, the Chunk size has been increased to 4GB from 2GB limitation from IDS 7.x versions. >> >>If we increase the chunk size from 2GB to 4GB, will it increase the performance or decrease the performance? If it will increase the performance, kindly let me know at what level it will start decreasing the performance. >> >>Apart from this if you guys have any details about the kernal settings for Informix DS 9.4 versions, kindly send the same to me on arvind.patkar@gmail.com/ dbbimail@gmail.com >> >>Thanks and regards, >>Arvind. >> >> >> >> >> >> >In IDS 9.x you can use chunks greater than 4 Gb. To change the default >behavior execute: >onmode -BC 1>and >onmode -BC 2> > >onstat -d shows the default Expanded chunk capacity mode.> > > > > >*Jairo Gubler* > > > > > >