RHEL x86_64 - Hugepages enabled - sar -B shows huge pgpout/s values
Hi All,
We have RHEL linux and run Oracle 11GR2 2 node RAC. since we have huge SGA's and since the system was showing heavy paging activity as reported by sar -B, we enabled Hugepages on the system. Below are the system details : Questions : 1) The pgpout/s values as shown by sar -B.. Are these normal? The system is not loaded in anyways. 2) Oralce and sys admins say they do not find any issues but my Oracle OEM says that huge paging activity at the system level. Could you give insights to the pgpout/s values what it means and what are some acceptable values ? Linux version 2.6.18-164.el5 Red Hat 4.1.2-46 ipcs ------ Shared Memory Segments -------- key shmid owner perms bytes nattch status 0x1b356c04 884736 oracle 660 15739125760 59 0x6da025cc 589825 oragrid 660 4096 0 0x27724b64 917506 oracle 660 5773459456 60 0x22f805c0 42139651 oracle 660 12081692672 52 more /proc/meminfo MemTotal: 264251616 kB MemFree: 82659408 kB Buffers: 1217488 kB Cached: 81433240 kB SwapCached: 1068 kB Active: 15349868 kB Inactive: 69833704 kB HighTotal: 0 kB HighFree: 0 kB LowTotal: 264251616 kB LowFree: 82659408 kB SwapTotal: 16777208 kB SwapFree: 16634724 kB Dirty: 2356 kB Writeback: 4 kB AnonPages: 2558472 kB Mapped: 312996 kB Slab: 1655112 kB PageTables: 108220 kB NFS_Unstable: 0 kB Bounce: 0 kB CommitLimit: 101710952 kB Committed_AS: 7288268 kB VmallocTotal: 34359738367 kB VmallocUsed: 407340 kB VmallocChunk: 34359330159 kB HugePages_Total: 46086 HugePages_Free: 39339 HugePages_Rsvd: 9272 Hugepagesize: 2048 kB vmstat -s 264251616 total memory 181582080 used memory 15352904 active memory 69817688 inactive memory 82669536 free memory 1217488 buffer memory 81417088 swap cache 16777208 total swap 142484 used swap 16634724 free swap 20815220 non-nice user cpu ticks 5233 nice user cpu ticks 6882729 system cpu ticks 3298163810 idle cpu ticks 9451579 IO-wait cpu ticks 84619 IRQ cpu ticks 1248075 softirq cpu ticks 0 stolen cpu ticks 4377738657 pages paged in 2655880655 pages paged out 9413 pages swapped in 4196084 pages swapped out 1484230378 interrupts 333553087 CPU context switches 1314825817 boot time 4805609 forks sar -B 1 1000 12:37:37 PM pgpgin/s pgpgout/s fault/s majflt/s 12:37:38 PM 12964.00 102745.00 53.00 0.00 12:37:39 PM 12988.00 105402.00 57.00 0.00 12:37:40 PM 4344.00 112829.00 359.00 0.00 12:37:41 PM 64.00 97006.00 47507.00 1.00 12:37:42 PM 116.00 109109.00 41096.00 1.00 12:37:43 PM 902.97 112683.17 45910.89 0.00 12:37:44 PM 128.00 106569.00 47398.00 0.00 12:37:45 PM 159696.00 31502.00 3299.00 0.00 12:37:46 PM 249728.00 2137.00 15772.00 0.00 12:37:47 PM 238178.22 46.53 1487.13 0.00 12:37:48 PM 177309.09 8834.34 157.58 0.00 12:37:49 PM 208.00 86833.00 117.00 0.00 12:37:50 PM 112.00 104642.00 178.00 0.00 12:37:51 PM 48.00 101545.00 408.00 0.00 12:37:52 PM 112.00 111187.00 34.00 0.00 12:37:53 PM 79.21 100012.87 80.20 0.00 12:37:54 PM 80.00 88642.00 56.00 0.00 12:37:55 PM 112.00 81041.00 74.00 0.00 12:37:56 PM 112.00 81410.00 182.00 0.00 12:37:57 PM 114592.00 35041.00 32.00 0.00 12:37:58 PM 228928.00 594.00 42.00 0.00 12:37:59 PM 183664.00 33.00 3783.00 0.00 12:38:00 PM 249040.00 2.00 49.00 0.00 12:38:01 PM 40633.66 37117.82 6441.58 0.00 12:38:02 PM 64.00 104930.00 45.00 0.00 12:38:03 PM 96.97 109782.83 3248.48 0.00 12:38:04 PM 79.21 106207.92 100.99 0.00 12:38:05 PM 176.00 111982.00 38.00 0.00 12:38:06 PM 80.00 107298.00 3091.00 0.00 12:38:07 PM 193.94 104260.61 271.72 0.00 12:38:08 PM 174.26 89439.60 3199.01 0.00 12:38:09 PM 184240.00 25825.00 38.00 0.00 12:38:10 PM 199160.40 204.95 91.09 0.00 12:38:11 PM 151806.06 8639.39 54.55 0.00 12:38:12 PM 160.00 70211.00 53.00 0.00 12:38:13 PM 112.00 97193.00 41.00 0.00 12:38:14 PM 174.26 100849.50 7226.73 0.00 12:38:15 PM 64.65 105996.97 4763.64 0.00 12:38:16 PM 272.00 109232.00 13576.00 0.00 12:38:17 PM 169726.73 26393.07 1061.39 0.00 12:38:18 PM 200048.00 106.00 73.00 0.00 12:38:19 PM 155152.00 15241.00 5304.00 0.00 12:38:20 PM 64.65 109024.24 52.53 0.00 12:38:21 PM 95.05 106523.76 77.23 |
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