SCO IPC

OK - I've RTFMed, but still in need of help. I am running SCO Unix 5.0.{245}, with Informix IDS.2000 Dynamic Server. Trying to initialize shared memory does not appear to work. The system utility "ipcs" does not report any shared memory being allocated, and the oninit -i seems just to hang. SCO's idea of shared memory is a little complicated. Perhaps I should just turn shared memory off completely ? (How?) Any suggestions ? Does anyone happen to have Informix running on such an OS, and have any advice to offer ? Thanks ! bw@cs.ecok.edu

Bill Walker wrote: > > OK - I've RTFMed, but still in need of help. > > I am running SCO Unix 5.0.{245}, with Informix IDS.2000 Dynamic Server. > > Trying to initialize shared memory does not appear to work. The system > utility "ipcs" does not report any shared memory being allocated, and > the oninit -i seems just to hang. > > SCO's idea of shared memory is a little complicated. Perhaps I should > just turn shared memory off completely ? (How?) Any suggestions ? > Does anyone happen to have Informix running on such an OS, and have any > advice to offer ? OK you tried, anyway. IDS works fine on SCO, there are thousands of installations all using shared memory, indeed IDS NEEDS shared memory to work at all. o Did you read the release notes ($INFORMIXDIR/release/*/*/ONLINE_9.2 for OS kernel build parameters needed by the engine? You may have to build a new kernel with the listed parameters set to AT LEAST the values shown there. o Have you booted the new kernel? o Did you try oninit -i -v to see the verbose mode messages? Post them. o Post your ONCONFIG file and a listing of appropriate disk files/devices being referenced there (ie: ROOTPATH). o Post number of CPUs, amount of RAM, etc. from your system config. We'll try to help now. Art S. Kagel

Art S. Kagel <kagel@bloomberg.net> wrote: > OK you tried, anyway. Yep. > IDS works fine on SCO, there are thousands of installations all using > shared memory, indeed IDS NEEDS shared memory to work at all. Shucks. That does surprise me. It can handle pipes, so I'm not sure why it can't use pipes exclusively. Oh, well. Not mine to reason why. > o Did you read the release notes ($INFORMIXDIR/release/*/*/ONLINE_9.2 Actually, they were in the file IDS_9.21 > for OS kernel build parameters needed by the engine? You may have > to build a new kernel with the listed parameters set to AT LEAST > the values shown there. > o Have you booted the new kernel? > o Did you try oninit -i -v to see the verbose mode messages? Post > them. The last thing it says is "Allocating and attaching to shared memory". There is where it just hangs. > o Post your ONCONFIG file and a listing of appropriate disk > files/devices being referenced there (ie: ROOTPATH). It does create the (cooked) file that I specify. > o Post number of CPUs, amount of RAM, etc. from your system config. 4 CPU, 256 mb RAM. > We'll try to help now. Thanks. You have helped a lot already. I now am sure that I have an OS problem. 73 de Bill W5GFE bw@cs.ecok.edu > Art S. Kagel

Bill Walker wrote: > > Art S. Kagel <kagel@bloomberg.net> wrote: > > > OK you tried, anyway. > > Yep. > > > IDS works fine on SCO, there are thousands of installations all using > > shared memory, indeed IDS NEEDS shared memory to work at all. > > Shucks. That does surprise me. It can handle pipes, so I'm > not sure why it can't use pipes exclusively. Oh, well. Not > mine to reason why. Need shared memory to put the shared data structures, like locks, the buffer cache, logical and physical log buffers, etc that all of the oninit processes need to share access to. Otherwise you would have to have a single caching process and make a request for a page by writing a message to a pipe and wait for the page-manager to push the data back down the pipe. Inherently too slow! With shared memory all of the CPU VPs and AIO VPs and threads get access to all of the buffers and other data structures concurrently (as much as access control will permit anyway). > > o Did you read the release notes ($INFORMIXDIR/release/*/*/ONLINE_9.2 > > Actually, they were in the file IDS_9.21 D%*& forgot they renamed the ONLINE* notes files to IDS* when 7.3x came out. But you found it. > > for OS kernel build parameters needed by the engine? You may have > > to build a new kernel with the listed parameters set to AT LEAST > > the values shown there. > > o Have you booted the new kernel? > > o Did you try oninit -i -v to see the verbose mode messages? Post > > them. > > The last thing it says is "Allocating and attaching to shared memory". > There is where it just hangs. > > > o Post your ONCONFIG file and a listing of appropriate disk > > files/devices being referenced there (ie: ROOTPATH). > > It does create the (cooked) file that I specify. > > > o Post number of CPUs, amount of RAM, etc. from your system config. > > 4 CPU, 256 mb RAM. > > > We'll try to help now. > > Thanks. You have helped a lot already. I now am sure that I have > an OS problem. As you say. Let up know the upshot. Art S. Kagel