Re: >1 Virtual Shared Memory Segment slow down

: David Williams wrote: : > : > I've been told by Informix that having >1 virtual shared memory : > segment slows down your Informix Online Database server.[snip] : > Why would added more shared memory segments slow down the server : > (they are mapped contiguously but the way)?? : > : > Anything internal to any UNIX kernel which may affect performance? : The person that told you this was most likely a bit confused. No, I'd agree with the person who said to keep your virtual segments to 1 (and no, I wasn't the one who said that in the first place :-) It appears, though, that it isn't limited to HP (as other people may have implied). I saw some unofficial tests which indicated that most platforms (of the small group that was tested) showed some degradation after 2 or 3 virtual segments were added. I think I'll move my disclaimer up... * * Standard disclaimers apply * June ---- June Tong Informix Software ---- ---- Senior Consultant (415) 926-6140 ---- ---- International Support junet@informix.com ---- ---- Location-du-jour: Menlo Park ---- - Please do not send me requests/questions by mail. When I have the knowledge - and time permits, I try to answer questions on comp.databases.informix, but - travel schedule, time, and volume make responding to personal requests - difficult and often slow. Please call your local Informix Technical Support - organization for assistance with technical issues.