Re: Very large instances
Added to the FAQ. Regards, David. > On 24 November 2013 at 22:17 Art Kagel <art.kagel@gmail.com> wrote: > > > FYI, no direct help here, but v12.10.xC2 no longer has to keep the buffer > pool in the resident segment, it has been moved into a virtual segment of > its own and can grow beyond that single segment so the requirement for the > buffer pool to be contiguous in memory is gone. > > Art > > Art S. Kagel, Principal Consultant > > Advanced DataTools (www.advancedatatools.com) > Blog: http://informix-myview.blogspot.com/ > > Disclaimer: Please keep in mind that my own opinions are my own opinions > and do not reflect on my employer, Advanced DataTools, the IIUG, nor any > other organization with which I am associated either explicitly, > implicitly, or by inference. Neither do those opinions reflect those of > other individuals affiliated with any entity with which I am affiliated nor > those of the entities themselves. > > On Sun, Nov 24, 2013 at 4:24 PM, NEIL TRUBY <neil.truby@ardenta.com> wrote: > > > IDS 11.70FC5 on RHEL 64-bit: > > > > We're running OK with about 110GB buggers and 90G SHMVIRTSIZE. > > > > We tried allocating some of an extra 256GB of RAM recently added to the > > server. > > We increased the huge pages by 70GB (sysctl -w vm.nr_hugepages=145000), and > > tried using 60GB of that for informix shm and buffers: > > > > 10GB extra for virtual > > 25GB extra for 8k and 16k bufferpools > > > > But it wouldnt work. > > > > SHMTOTAL is 0 and kernel.shmmax is 4Tb. > > > > Messages below - basically "Contiguous shared memory segment allocation > > failed" is Bad News and your oncommands are going to fail sporadically, so > > the > > instance has to be re-started until you don't get them. > > > > We'll raise a call with IBM when they're open, but I just wondered what > > other > > very large instances are out there? > > > > Thanks > > Neil > > ========================================================== > > Fri Nov 22 11:12:44 2013 > > > > 11:12:44 Event alarms enabled. ALARMPROG = > > '/opt/informix/INST1/scripts/alarmprogram.sh' > > 11:12:44 Booting Language <c> from module <> > > 11:12:44 Loading Module <CNULL> > > 11:12:44 Booting Language <builtin> from module <> > > 11:12:44 Loading Module <BUILTINNULL> > > 11:12:55 DR: DRAUTO is 0 (Off) > > 11:12:55 DR: ENCRYPT_HDR is 0 (HDR encryption Disabled) > > 11:12:55 shmat: [22]: operating system error > > 11:12:55 Client could not attach server shared memory segment, use > > IFX_XFER_SHMBASE. > > 11:12:55 (2) shm creation of shmem segment failed > > 11:15:45 IBM Informix Dynamic Server Started. > > 11:15:45 Contiguous shared memory segment allocation failed at > > 0x25e0edd000. > > Allocation successful at 0x2aaaaee2e000. > > Check SHMBASE is consistent with the value in > > $INFORMIXDIR/etc/onconfig.std. > > If you are using the correct SHMBASE value in your ONCONFIG file, then > > consider this message informational only. > > > > > > > > > ******************************************************************************* > > Forum Note: Use "Reply" to post a response in the discussion forum. > > > > > > --047d7b3a84c292487d04ebf39d3b > > > ******************************************************************************* > Forum Note: Use "Reply" to post a response in the discussion forum. >