lingu wrote:
Dear all, I am getting below syslog error on my oracle database server running on RHEL4U5. During this time my swap shows zero on both available and free in the top command output , result in total system hang. can any one guide me how to fix this issue of memory and exactly what this error indicates?? ERROR FROM SYSLOG ##################################################################################################### Aug 30 15:46:20 crmdb kernel: cpu 7 cold: low 0, high 32, batch 16 Aug 30 15:46:20 crmdb kernel: Aug 30 15:46:20 crmdb kernel: Free pages: 16000kB (2560kB HighMem) Aug 30 15:46:20 crmdb kernel: Active:1433949 inactive:40363 dirty:1 writeback:0 unstable:0 free:4 000 slab:24910 mapped:1405036 pagetables:565097 Aug 30 15:46:20 crmdb kernel: DMA free:12544kB min:16kB low:32kB high:48kB active:0kB inactive:0k B present:16384kB pages_scanned:1878896 all_unreclaimable? yes Aug 30 15:46:20 crmdb kernel: protections[]: 0 0 0 Aug 30 15:46:20 crmdb kernel: Normal free:896kB min:928kB low:1856kB high:2784kB active:736kB ina ctive:208kB present:901120kB pages_scanned:1889 all_unreclaimable? yes Aug 30 15:46:20 crmdb kernel: protections[]: 0 0 0 Aug 30 15:46:20 crmdb kernel: HighMem free:2560kB min:512kB low:1024kB high:1536kB active:5735060 kB inactive:161244kB present:8257532kB pages_scanned:0 all_unreclaimable? no Aug 30 15:46:20 crmdb kernel: protections[]: 0 0 0 Aug 30 15:46:20 crmdb kernel: DMA: 2*4kB 5*8kB 3*16kB 3*32kB 3*64kB 3*128kB 2*256kB 0*512kB 1*102 4kB 1*2048kB 2*4096kB = 12544kB Aug 30 15:46:20 crmdb kernel: Normal: 0*4kB 28*8kB 2*16kB 0*32kB 0*64kB 1*128kB 0*256kB 1*512kB 0 *1024kB 0*2048kB 0*4096kB = 896kB Aug 30 15:46:20 crmdb kernel: HighMem: 512*4kB 8*8kB 2*16kB 1*32kB 0*64kB 1*128kB 1*256kB 0*512kB 0*1024kB 0*2048kB 0*4096kB = 2560kB Aug 30 15:46:20 crmdb kernel: Swap cache: add 26913978, delete 26700605, find 10635368/14522876, race 848+1364 Aug 30 15:46:20 crmdb kernel: 0 bounce buffer pages Aug 30 15:46:20 crmdb kernel: Free swap: 14593184kB Aug 30 15:46:20 crmdb kernel: 2293759 pages of RAM Aug 30 15:46:20 crmdb kernel: 1867351 pages of HIGHMEM Aug 30 15:46:20 crmdb kernel: 216549 reserved pages Aug 30 15:46:20 crmdb kernel: 44388024 pages shared Aug 30 15:46:20 crmdb kernel: 213522 pages swap cached Aug 30 15:46:20 crmdb kernel: Out of Memory: Killed process 22462 (oracle). ##############################################################################################################
Not sure if this is connected, but I had what looks like a similar problem - see: <https://bugzilla.redhat.com/show_bug.cgi?id=193542>
The workaround I use is to use the following sysctl setting: vm.lower_zone_protection = 100 James Pearson _______________________________________________ CentOS mailing list CentOS@xxxxxxxxxx http://lists.centos.org/mailman/listinfo/centos
