Re: How to set configuration parameters to get maximum performance

I use RS/6000 (uniprocessors) , Informix 7.11.UC1, RAID 5 disk, and ESQL/Cobol. Although the RAID disk may not be the fastest, it's not that bad, especially if you have write cache. (I don't) What exactly are your problems? My only initial advice is that generally running a 2 CPU machine does not warrant turning on the MULTIPROCESSOR flag because the added overhead is greater than the benefit of the additional CPU. It's usually better to wait until you have 4 CPUs before you turn that flag on. Bruce Farwell Spartan Stores, Inc. Grand Rapids, MI >I'm facing a major performance problem with Informix 7.21 on a IBM RS >6000 >two processor machine running AIX 4.1.5 and two RAID 5 subsystems with >4x4 GB each. Informix is placed on machines root device (4 GB mirrored). >In addition we >have to use Informix ESQL-COBOL API. >So my questions to you are: does anybody have experience with such a configuration? >I think using that RAID level will slow down performance but how much? I >also >think COBOL isn't the best language to use on an multi-processor >machine. But there's no way out :-( >Thanks in advance >Volker.