CPU usage normally sits around 10-15%.
I see spikes to 100% CPU occasionally. This is what one looks like:
Wed Aug 4 16:04:01 PDT 2010
procs -----------memory---------- ---swap-- -----io---- -system-- -----cpu------
r b swpd free buff cache si so bi bo in cs us sy id wa st
6 0 264172 49688 16484 166972 3 3 16 6 9 12 15 3 81 0 0
5 0 264172 49360 16504 167076 0 0 0 54 1459 251 5 95 0 0 0
6 0 264172 49100 16524 167188 0 0 0 105 1333 246 5 95 0 0 0
8 0 264172 48808 16552 167360 0 0 0 114 1447 226 5 95 0 0 0
13 1 264172 48168 16568 167452 1 0 1 90 1509 237 4 96 0 0 0
6 0 264172 46192 16588 167556 0 0 0 106 1481 226 4 96 0 0 0
10 0 264172 43588 16612 167640 0 0 0 106 1437 213 5 95 0 0 0
9 0 264172 42720 16632 167732 0 0 0 77 1428 219 4 96 0 0 0
9 0 264172 41604 16652 167816 0 0 0 66 1377 185 4 96 0 0 0
9 0 264172 40984 16680 167876 0 0 0 90 1342 169 3 97 0 0 0
15 0 264172 40488 16696 167992 0 0 0 82 1348 188 4 96 0 0 0
10 0 264172 40116 16720 168064 0 0 0 78 1484 208 3 97 0 0 0
Wed Aug 4 16:04:59 PDT 2010
procs -----------memory---------- ---swap-- -----io---- -system-- -----cpu------
r b swpd free buff cache si so bi bo in cs us sy id wa st
12 0 264172 40008 16724 168084 3 3 16 6 9 12 15 3 81 0 0
16 0 264172 38812 16748 168132 0 0 3 82 1364 180 3 97 0 0 0
15 0 264172 38228 16764 168180 0 0 0 45 1312 170 3 97 0 0 0
18 2 264172 36732 16792 168256 0 0 4 133 1322 180 2 98 0 0 0
21 0 264172 36724 16824 168288 0 0 0 62 1507 170 2 98 0 0 0
21 1 264172 35996 16836 168308 0 0 1 40 1369 168 2 98 0 0 0
16 0 264172 35112 16864 168332 0 0 0 31 1714 207 2 98 0 0 0
19 0 264172 34252 16876 168340 0 0 0 24 1252 133 3 97 0 0 0
31 0 264172 33880 16896 168364 0 0 0 39 1568 163 1 99 0 0 0
19 0 264172 32996 16916 168404 10 0 10 34 1419 136 2 98 0 0 0
36 0 264172 31260 16924 168412 0 0 0 10 1451 126 1 99 0 0 0
27 0 264172 30888 16952 168572 0 0 17 43 1625 141 1 99 0 0 0
Wed Aug 4 16:06:20 PDT 2010
procs -----------memory---------- ---swap-- -----io---- -system-- -----cpu------
r b swpd free buff cache si so bi bo in cs us sy id wa st
37 3 264172 26444 17012 168596 3 3 16 6 10 12 15 3 81 0 0
4 0 269628 49604 16276 165564 4 1091 598 1312 2024 1923 72 28 0 0 0
3 0 269628 42704 16376 168176 0 0 105 518 1470 1153 88 12 0 0 0
2 0 269528 37000 16400 172756 0 0 91 837 1633 966 84 16 0 0 0
3 0 269524 18524 16432 172724 0 0 0 302 1303 452 94 6 0 0 0
2 0 269524 34900 16452 172752 0 0 0 449 1305 364 95 5 0 0 0
2 0 269524 37132 16472 172508 0 0 0 110 1343 947 88 12 0 0 0
3 0 269380 29688 16532 174320 136 0 179 431 1502 1911 84 16 0 0 0
1 0 269380 47372 16592 174592 0 0 23 263 1559 1534 87 13 0 0 0
1 0 269320 47268 16616 174744 0 0 0 102 1263 537 93 7 0 0 0
1 0 269320 46980 16644 175004 0 0 17 136 1941 277 94 5 0 1 0
1 0 269256 46212 16672 175312 0 0 0 180 1931 340 95 5 0 0 0
I have turned off intrusion prevention. I have the kids going through the web filter but I see these spikes even when they're all asleep and can find no correlation between these CPU spikes and heavier than normal usage. It seems to occur every two hours or so, but not with much regularity.
It's not inbound traffic in general. Here's me running bittorrent full-tilt:
Wed Aug 4 17:38:40 PDT 2010
procs -----------memory---------- ---swap-- -----io---- -system-- -----cpu------
r b swpd free buff cache si so bi bo in cs us sy id wa st
0 0 291732 89228 11076 206172 3 3 16 6 11 13 15 3 81 0 0
2 0 291732 89080 11088 206220 0 0 0 38 3776 2597 15 9 77 0 0
1 0 291732 89080 11108 206328 0 0 0 37 3206 2275 15 7 78 0 0
0 0 291732 88956 11140 206300 0 0 5 40 4276 2635 15 8 76 1 0
0 0 291732 88956 11160 206316 0 0 0 36 3802 2550 13 7 80 0 0
0 0 291732 88956 11172 206340 0 0 0 38 3883 2567 14 7 79 0 0
0 0 291732 78416 11196 206348 0 0 0 39 2846 1525 24 11 64 0 0
0 0 291732 88832 11216 206380 0 0 0 41 5845 2455 24 13 63 0 0
1 0 291732 88708 11240 206420 0 0 0 47 5731 3227 20 11 69 0 0
0 0 291732 88708 11260 206444 0 0 0 40 4066 2662 13 7 79 0 0
1 0 291732 88708 11276 206460 0 0 0 32 3893 2739 13 8 79 0 0
2 0 291732 88832 11304 206488 0 0 0 43 3921 2691 17 10 74 0 0
Any thoughts on diagnosing the nature of the spike in interrupts?
Anyone else seeing anything similar?
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