Universe may be fast but it is only as fast as the system underneath, keeping data in memory is often desirable.
Having Plenty of ram will improve matters no end as aix will use every available bit of memory for the disk cache, data that is used often stays in memory and is flushed every 15 seconds or so to disk. If you are having wait on disk problems I would recommend you also improve your disks , 15k sas drives in a raid 10 arrangement are pretty much as quick as you can get these days. Ramdisks are a good way to go but they have their own issues and it is important you understand what they can offer. There is a u2 house who frequent this list who have what seems a fairly revolutionary offering on solid state disk storage technology and maybe they can respond to this. Rgds Symeon -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Anthony Youngman Sent: 23 October 2008 09:22 To: '[email protected]' Subject: RE: [U2] UniVerse and/or AIX caching It's probably AIX that's doing the caching. If it's like linux, there's no way to tell it - it will just aggressively cache everything until it runs out of spare RAM. Question is, why do you want these files in RAM? UV is very fast at retrieving from disk so what's the reason? And it sounds like you want a file-type that INFORMATION had - I can't remember what filetype it was because I only ever used it once, but it was pinned in memory and read-only - intended iirc for very fast lookups. I would be very surprised if UV has what you want, because they would have copied this file type, and they haven't. They probably didn't see any need for it. Cheers, Wol -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Louie Bergsagel Sent: 23 October 2008 00:31 To: [email protected] Subject: [U2] UniVerse and/or AIX caching I've heard that UniVerse will cache data, or leave data in memory in case the next request needs it. Is there any way to control how much data gets kept in memory, and for how long? If one has 32 gigabytes of memory on an AIX machine, is there any way to tell the operating system (or UniVerse) to load whole (several) files in memory so the data can be accessed instantaneously, or is configuring some memory as a ramdisk the closest one can get to that? -- Louie in Seattle AIX 5.2 UniVerse release 10.2.7 UniVerse syntax: PICK ------- u2-users mailing list [email protected] To unsubscribe please visit http://listserver.u2ug.org/ ------- u2-users mailing list [email protected] To unsubscribe please visit http://listserver.u2ug.org/ No virus found in this incoming message. Checked by AVG - http://www.avg.com Version: 8.0.175 / Virus Database: 270.8.2/1738 - Release Date: 22/10/2008 19:24 No virus found in this outgoing message. Checked by AVG - http://www.avg.com Version: 8.0.175 / Virus Database: 270.8.2/1738 - Release Date: 22/10/2008 19:24 ------- u2-users mailing list [email protected] To unsubscribe please visit http://listserver.u2ug.org/
