Re: Shared Memory Error

nnob@loc.gov (Nick Nobbe) wrote: : Env: Sco Unix 3.2.4.2 on Altos/Acer 5000 (486DX 66) with 16M memory This isn't much memory for OnLine. It may run, but not very fast. : We are trying to install Online 5.+ and have hit the message "Shared memory : base address illegal" or words to that effect. Never ever say this if you realy want an answer. Say exactly what message you got, and exactly where and from what program. It's unnecessarily hard to help you without that info. : So far no luck changing the : current kernel parameters for shared memory which by the way do not include : a choice of base address (at least not obvious to us). After relinking and : restarting the system, the same error appears. : What is a good starting point for these parameters and what are we missing? : We have r several fm (SCO and Informix release notes) but are not getting it. : Any clues? If it's in the manual, cite chapter, verse, or any hint. Oh yes, : and I saw a reference about the tuning parameters in the FAQ but with regard : to Solaris. We run OnLine 7.10 on SCO 3.2.4.2 on a Pentium 100 with 64Mb memory. Although your machine is smaller and the engine older you may get some ideas from our /etc/conf/cf.d/stune file. (Don't modify this file directly, but use the usual sysadmsh menues to do it.) Of course you don't need to set all these parameters simply to make OnLine run. Several are related to TCP/IP and other parts of the kernel that are not strictly necessary. Some of these values are black art to me. Some has to be set far outside the recomended values from SCO so you get nasty error messages when you relink the kernel. You have to ignore them and see if your machine still runs. In our case we also had to modify several parameters that where not mentioned in the release notes from Informix, and set some that where mentioned to significantly different values. Obviously noone at Informix (or SCO) realy bother too much about assembling realy usefull information on this important area. SECLUID 0 SECSTOPIO 1 SECCLEARID 1 NINODE 1024 NS5INODE 450 NFILE 1024 NQUEUE 864 NSTREAM 256 NBLK4096 32 NBLK2048 32 NBLK1024 128 NBLK512 128 NBLK256 256 NBLK128 1024 NBLK64 1024 NBLK16 1024 NBLK4 768 NUMTIM 32 NUMTRW 32 EVQUEUES 72 EVDEVS 80 NCALL 128 NPROC 512 NREGION 1600 MAXUP 200 NOFILES 256 MAXUMEM 16384 SEMMNI 50 SEMMNS 256 SEMMNU 50 SHMMAX 80530637 NDISK 6 MAX_CFGSIZE 8192 NHINODE 128 DMAABLEBUF 32 SEMMAP 200 SEMMSL 150 SHMSEG 10 KBTYPE 1 NSPTTYS 64 Nils.Myklebust@ccmail.telemax.no NM Data AS, P.O.Box 9090 Gronland, N-0133 Oslo, Norway My opinions are those of my company