Re: CRITICAL SITUATION - who has seen this Page Check Error problem
In article <5nk5gj$st3@camel2.mindspring.com>, Barry Leb <barryleb@atl.mindspring.com> writes >"Jerry A. Van Zant" <jvanzant@msn.com> wrote: > >>What is the size of your chunks? and their offsets? > >Dbspaces >address num flags fchunk nchunks flags owner name >c50980f0 1 2 1 1 M informix rootdbs >c50c5a98 2 2001 2 1 N T informix tempdbs >c50c5b00 3 2 3 1 M informix physdbs >c50c5b68 4 1 4 2 N informix fsprod_data_01 >c50c5bd0 5 1 5 2 N informix fsprod_data_02 >c50c5c38 6 1 9 1 N informix fsprod_index_01 >c50c5ca0 7 1 10 1 N informix fsprod_index_02 >c50c5d08 8 1 8 1 N informix logdbs > 8 active, 2047 maximum > >Chunks >address chk/dbs offset size free bpages flags pathname >c5098158 1 1 0 26000 25293 PO- /dev/informix/rootdbs >c5098230 1 1 0 26000 0 MO dev/informix/rootmirror_dbs >c50c5228 2 2 0 96000 95947 PO- /dev/informix/tempdbs >c50c5300 3 3 0 12000 8547 PO- /dev/informix/physdbs >c50c59c0 3 3 0 12000 0 MO-/dev/informix/mphysdbs >c50c53d8 4 4 0 750000 3 PO /dev/informix/fsprod_data_01 >c50c54b0 5 5 0 750000 4 PO-/dev/informix/fsprod_data_02 >c50c5588 6 5 0 250000 147623PO-/dev/informix/fsprod_index_01 >c50c5660 7 4 0 250000 198817 PO-/dev/informix/fsprod_index_02 >c50c5738 8 8 0 250000 1377 PO- /dev/informix/logdbs >c50c5810 9 6 250001 500000 107200PO-/dev/informix/fsprod_index_01 >c50c58e8 10 7 250000 500000 80274 PO-/dev/informix/fsprod_index_02 > 10 active, 2047 maximum > > What does ls -l /dev/informix give? I suspect you have 2 chunks overlapping...i.e. two entries in /dev/informix point to the same physical device and the sizes/offsets mean they are overlapping. If you are using a Logical Volumn Manager this could add another layer of posibilities that something is overlapping...possibly one link points to a virtual device and one to the actual physical disk... or two logical volumes overlap. Also check that your swap devices do not overlap filesystems / raw partitions or each other. I once saw Page Check errors where someone had configured two swap devices which overlapped!! >>Barry Leb <barryleb@atl.mindspring.com> wrote in article >><5njskb$fqf@camel12.mindspring.com>... >>> We are in dire straits at this time. We are running informix >>> 7.11.uc.1 on an HP 9000 h70, HP-UX 9.04. We are using the NikeArrays >>> with 6-2gig drives configured as 2 RAID 5 devices(Please don't make >>> fun, it wasn't my doing). We have split the data in two. Half the >>> tables reside on one device, with its indexes detached onto the second >>> RAID 5 device and vice versa. >>> >>> This is the problem. Over the last 2 weeks the engine has crashed 5 >>> times with Page Check Errors usually pointing to bad pages or bad >>> current nodes. Onchecks and dumps of the data pages are showing data >>> pages belonging to Chunk 10 which is dedicated to Indexes showing up >>> in Chunk 6 which is dedicated to tables only. >>> >>> Has anyone seen anything like this. We have had a production system >>> down for 2 days and neither Informix nor HP has been able to diagnose >>> this one yet. >>> >>> As a side note, we are seeing some of the same problems on a separate >>> HP 900 k400 running HPUX 10.01. Also Informix is same at 7.11.uc1. >>> However, using RAID 0 here. >>> >>> One last thing. This problem occurred within 24hrs after an upgrade to >>> 7.11 from 6.00. However, the second system has been running 7.11 for >>> over a year. >>> >>> Barry Leb >>> >>> National Linen Service >>> 1420 Peachtree Street >>> MS #230 >>> Atlanta, GA 30309 >>> e-mail: barryleb@mindspring.com >>> >>> > > >Barry Leb > >National Linen Service >1420 Peachtree Street >MS #230 >Atlanta, GA 30309 >e-mail: barryleb@mindspring.com > -- David Williams