Bug 97523
| Summary: | (VM)excessive and constant swapping | ||
|---|---|---|---|
| Product: | [Retired] Red Hat Linux | Reporter: | Christopher Chan <cchan> |
| Component: | kernel | Assignee: | Arjan van de Ven <arjanv> |
| Status: | CLOSED WONTFIX | QA Contact: | Brian Brock <bbrock> |
| Severity: | high | Docs Contact: | |
| Priority: | medium | ||
| Version: | 7.2 | CC: | riel, yusufg |
| Target Milestone: | --- | ||
| Target Release: | --- | ||
| Hardware: | i686 | ||
| OS: | Linux | ||
| Whiteboard: | |||
| Fixed In Version: | Doc Type: | Bug Fix | |
| Doc Text: | Story Points: | --- | |
| Clone Of: | Environment: | ||
| Last Closed: | 2004-09-30 15:41:09 UTC | Type: | --- |
| Regression: | --- | Mount Type: | --- |
| Documentation: | --- | CRM: | |
| Verified Versions: | Category: | --- | |
| oVirt Team: | --- | RHEL 7.3 requirements from Atomic Host: | |
| Cloudforms Team: | --- | Target Upstream Version: | |
| Embargoed: | |||
Some numbers for a postfix box running 7.2 and the latest errata kernel [root@spf1 postfix]# vmstat 1 procs memory swap io system cpu r b w swpd free buff cache si so bi bo in cs us sy id 0 198 1 38296 9780 343628 428872 0 0 11 7 8 24 9 9 12 3 187 1 37900 9584 343672 422032 68 4 72 2544 1204 1801 16 25 59 2 176 1 40032 9472 343260 408828 36 3356 52 6400 1783 3180 27 54 19 0 140 1 43808 9432 342816 405556 132 4156 152 12392 2138 4599 14 29 57 0 117 1 44892 9416 342588 405868 124 1420 152 10268 1889 4131 5 14 82 postsuper: warning: bogus file name: incoming/586936.11341 0 92 2 44848 9496 342556 406024 132 348 136 3648 896 1843 4 21 75 0 13 1 44588 8472 342660 406032 400 68 408 9144 1824 3574 6 22 71 0 6 1 43872 8492 342540 402692 244 864 244 4224 1279 1861 17 33 50 0 20 1 44392 10324 342040 402992 324 920 392 1180 1169 1391 4 23 72 1 4 1 43500 10796 342072 403904 572 240 584 10664 2350 4812 14 30 56 0 13 3 43500 11352 341872 404576 8 12 12 5464 1302 1921 2 8 90 0 5 4 43452 11364 341632 405140 76 220 88 3544 1254 1854 4 19 77 1 4 1 43584 10328 341480 406880 84 404 84 17772 3584 8070 10 25 64 1 3 1 43924 9496 341528 407708 36 388 36 12356 2632 5193 6 20 74 0 2 1 43964 10272 341608 408192 272 456 296 14112 2620 5032 8 16 76 2 3 2 42968 9804 341712 408320 384 196 384 4416 2022 3953 10 18 72 0 2 1 43076 9508 342044 408760 20 132 24 15308 2469 4719 4 27 69 2 2 1 41604 10328 342100 408772 228 288 248 5336 1302 4672 20 30 50 0 2 1 40316 11844 342268 409208 332 0 332 11980 2230 5062 11 22 67 0 5 1 40244 11896 342276 409704 68 196 80 9536 1609 3401 6 10 85 0 3 1 39008 12824 342484 410080 148 0 148 10556 1891 4110 10 14 76 3 7 1 37548 14768 342588 410512 136 196 264 5960 1270 3630 14 35 51 0 6 1 36496 17040 342892 410724 64 0 68 15336 2035 5748 15 25 61 0 1 1 35700 18724 342924 411092 168 96 304 3336 1129 3708 18 15 67 7 23 3 34356 20520 342924 411664 192 192 192 6056 1281 6739 24 24 52 5 14 2 33600 9652 343084 412140 60 0 60 11056 2467 5778 34 52 14 51 75 1 32300 15996 342956 405348 212 876 220 6124 1662 7525 25 65 10 6 89 3 31496 9580 342848 406184 176 228 176 12256 2846 10104 29 70 0 0 146 3 36416 9748 342372 392380 24 5476 36 5828 753 1505 22 43 35 7 203 1 35440 9436 342160 389872 208 508 216 2824 1110 3440 15 27 58 74 192 4 33080 11788 341796 387148 144 1116 244 10740 2846 10843 31 68 1 1 214 2 35372 9384 341548 377176 168 3108 260 8424 1707 4836 32 52 16 4 303 3 32820 9388 340152 374268 916 3540 1124 5484 1502 5060 25 63 12 0 372 1 28084 13920 340052 372048 916 320 1044 1004 1033 5751 13 33 54 2 347 1 21396 13268 339656 372792 1600 832 1604 5724 2388 6883 29 52 20 0 384 2 23812 9644 339668 370824 4 2424 4 4892 1251 3676 14 43 43 2 387 2 24812 9500 339756 370356 232 1500 248 7028 1841 6639 17 24 59 1 399 1 25560 9380 339884 369396 312 1120 400 10000 2100 5746 14 32 54 0 362 2 28260 9364 339996 367844 212 2700 224 10632 2450 9449 18 37 45 0 395 1 29020 9348 340000 367504 116 888 132 1896 987 3022 5 13 82 FYI. I switched to a RH based kernel that had XFS patches applied, 2.4.20-13SGI_XFS_1.2.0.smp, on the postfix box and the swapping went away. We have observed the same behaviour on a webserver machine running RH 7.3. Downgrading to a RH 2.4.18-27x would eliminate the problem. Or switching to a RH 2.4.20-xx that has SGI XFS patches applied. Thanks for the bug report. However, Red Hat no longer maintains this version of the product. Please upgrade to the latest version and open a new bug if the problem persists. The Fedora Legacy project (http://fedoralegacy.org/) maintains some older releases, and if you believe this bug is interesting to them, please report the problem in the bug tracker at: http://bugzilla.fedora.us/ |
From Bugzilla Helper: User-Agent: Mozilla/5.0 (X11; U; Linux i586; en-US; rv:1.3a) Gecko/20021207 Phoenix/0.5 Description of problem: I find that for boxes using RH 7.2 or 7.3, if I upgrade to any of the 2.4.20-xx.7 releases for RH 7.x, a lot of swapping occurs. Worst yet, free -m shows that there is plenty of memory that could have been used instead of paging to disk... Version-Release number of selected component (if applicable): kernel-smp-2.4.20-xx(13/18).7 How reproducible: Always Steps to Reproduce: 1. start server 2. put some load on the services 3. wait Actual Results: vmstat 1 reports plenty of swapping even though there is PLENTY of physical memory available.... Expected Results: when there is physical memory available, there should not be any constant paging to disk Additional info: vmstat 1 procs memory swap io system cpu r b w swpd free buff cache si so bi bo in cs us sy id 0 417 1 129884 9572 307492 383892 0 1 11 11 9 30 9 9 12 1 401 1 129980 9500 307564 383736 24 124 240 8528 2418 8975 14 41 44 4 376 1 130256 9512 307620 383536 12 596 260 10508 3074 12116 23 52 25 0 394 1 130456 9572 307676 383208 48 324 92 6552 2203 6585 12 42 47 0 399 1 130604 9568 307632 383172 12 220 52 3200 1072 3674 8 13 78 0 380 2 130512 9592 307688 383084 36 0 104 6560 1800 8267 15 32 53 4 373 1 130556 9604 307716 382968 20 160 276 9288 2629 11318 16 63 21 0 377 1 130676 9592 307780 382928 16 124 232 6904 2048 8183 11 38 51 [root@spf1 postfix]# free -m total used free shared buffers cached Mem: 1006 997 9 0 300 374 -/+ buffers/cache: 322 683 Swap: 2047 127 1919 [root@spf1 postfix]# cat /etc/redhat-release Red Hat Linux release 7.2 (Enigma) [root@spf1 postfix]# uname -a Linux spf1.us.outblaze.com 2.4.20-18.7smp #1 SMP Thu May 29 07:49:23 EDT 2003 i686 unknown