From: Alan Greig [agreig@my-deja.com] Sent: Wednesday, March 15, 2000 11:09 AM To: Info-VAX@Mvb.Saic.Com Subject: Re: Is there an OpenVMS success story about this? In article <068e01bf8e82$1ca8a410$020a0a0a@xile.realm>, "John E. Malmberg" wrote: > Alan Greig wrote: > > > "Bill Todd" wrote: > > > If they're creating a new file for each mail message received, > > > then the problem is not in RMS but rather in the synchronous > > > nature of ODS-2 directory and file meta-data handling. > > > > Setting XQPCTL2 = 1 (improved concurrency) makes a considerable > > difference in recent releases of VMS. > > When the parameter was introduced as an add-on for OpenVMS 5.5-2, the > release notes stated that programs had to be specially written to take > advantage of it. > > Has that changed? Do the underlying language run-time libraries now use it? I think you are thinking of XQPCTLD1 (improved multithreading). XQPCTL2 (improved concurrency) does not require any coding changes. You can easily see a file system speed up by turning this on if it does lots of large atomic XQP operations. The Pathworks release notes originally suggested setting these two sysgen params IIRC. > -John > wb8tyw@qsl.network > > -- Alan Greig Sent via Deja.com http://www.deja.com/ Before you buy.