Re: IDS 7.31 on DEC Unix

"remove (_at_) to reply" wrote: > > About month ago I have performance problems on 2 CPU DEC Alpha and one of > advises was to add more CPUs. > So we change old one Alpha with new one. > New is Alpha 4100 with 4 CPUs and 2G of RAM. KIO is enabled. Nice. > Now I have some problems: > > *************** 1. problem *************************** > I try to set BUFFERS to 250000 but I get this message. > > 13:04:23 shmget: [ENOMEM][12]: key 52564801: out of shared memory, check system> max shared memory segment size > 13:04:23 mt_shm_init: can't create resident segment> > I put BUFFERS to 120000 and everythings work. You need to up the per process memory parameter in the kernel. The default is usually about 1 Gb on DEC. I think ulimit -v will change it temporarily. Use ulimit -a to view vmemory. Cheers, -- Mark. +----------------------------------------------------------+-----------+ | Mark D. Stock mailto:mdstock@mydas.freeserve.co.uk |//////// /| | http://www.informix.com http://www.informixhandbook.com |///// / //| | http://www.iiug.org +-----------------------------------+//// / ///| | |This email will self-destruct in |/// / ////| | |10 sec. If you received this email |// / /////| | |in error, sorry about the mess. |/ ////////| +----------------------+-----------------------------------+-----------+

On Thu, 06 Jul 2000 22:47:04 +0100, "Mark D. Stock" >You need to up the per process memory parameter in the kernel. The >default is usually about 1 Gb on DEC. I think ulimit -v will change it >temporarily. Use ulimit -a to view vmemory. > >Cheers, I tried: disko2> ulimit -a 1048576 disko2> onstat -g seg Informix Dynamic Server Version 7.31.FC5 -- On-Line -- Up 1 days 16:16:58 -- 319488 Kbytes Segment Summary: id key addr size ovhd class blkused bl kfree 256 1381386241 200000000 276824064 5120 R* 33395 39 7 257 1381386242 210800000 33554432 1016 V 3151 94 5 258 1381386243 212800000 8388608 632 M 69 95 5 3 1381386244 213000000 16777216 760 V 111 19 37 Total: - - 335544320 - - 36726 42 34 (* segment locked in memory) But, as you can see, virt.seg.size is about 250 M. If I put BUFFERS=250000 (130000 more), virt.seg.size will be about 512 M. So why I have message 13:04:23 shmget: [ENOMEM][12]: key 52564801: out of shared memory, check system max shared memory segment size 13:04:23 mt_shm_init: can't create resident segment