I've got a freebsd 6.2 system, dual 2Ghz 5130 cpu, 4g ram, with raid5
Adaptec 2120s, running not much more than /usr/ports/mail/imap-uw
and I'm having performance problems with only 20 IMAP users.

I'm not swapping.. cpu is mostly idle, so I figure it must be I/O
performance.  Just to confirm, is that what the following show?

Thanks,
-mark

last pid: 81212; load averages: 0.01, 0.08, 0.08 up 87+17:07:41 12:44:46
87 processes:  1 running, 86 sleeping
CPU states: 0.0% user, 0.0% nice, 0.0% system, 0.0% interrupt, 100% idle Mem: 542M Active, 2860M Inact, 271M Wired, 109M Cache, 214M Buf, 40M Free
Swap: 4096M Total, 19M Used, 4077M Free

# vmstat 5
 procs      memory      page                   disk   faults      cpu
r b w avm fre flt re pi po fr sr aa0 in sy cs us sy id 0 2 1 700876 214348 375 10 0 0 217 503 0 504 163 214 0 1 99 0 2 0 703064 204504 432 0 2 0 10431 9626 333 998 13331 3595 1 3 96 0 1 0 699548 162820 119 0 0 0 2340 0 86 431 3681 1332 0 1 99 0 1 0 699548 162820 0 0 0 0 0 0 0 259 603 608 0 0 100 0 0 1 699548 162836 0 0 0 0 6 0 11 243 476 590 0 0 100 0 1 0 699548 162840 11 0 0 0 11 0 0 294 724 681 0 0 100 0 2 0 702140 154740 399 0 0 0 534 0 13 351 6118 869 1 1 99 0 2 0 702140 169360 25 0 0 0 9605 10308 314 835 10632 3127 1 2 97 0 2 0 702140 182172 30 0 0 0 9717 10312 311 872 10589 3182 1 2 96 0 1 0 702076 214312 256 0 0 0 8907 10306 289 836 11190 3052 1 2 97 1 1 0 702056 169060 180 0 0 0 2430 0 86 440 3600 1339 0 0 99 0 1 0 702076 168944 271 0 0 0 304 0 6 349 3303 836 0 1 99 0 1 0 703428 167680 245 0 0 0 149 0 7 276 1350 689 0 0 100 1 1 0 707064 155304 9018 0 10 0 9034 0 84 785 15093 3682 2 4 94 1 1 0 706552 154300 2015 0 0 0 1731 0 18 505 4831 1419 0 1 99 0 3 0 705336 113604 506 0 0 0 2109 0 80 411 5056 1276 0 1 99 0 3 0 738504 159624 2422 0 0 0 8775 10335 273 813 8293 2972 1 3 96 0 4 0 720280 178408 146 0 0 0 1056 0 579 929 1252 3055 1 3 96 1 1 0 702528 195568 270 0 0 0 1061 0 194 527 33855 1418 3 4 93 0 1 0 701200 196416 17 0 0 0 45 0 1 251 1066 598 0 0 100 0 1 0 702856 195232 445 0 0 0 266 0 6 332 10429 816 1 1 98 0 1 0 703460 195044 324 0 0 0 245 0 5 301 1585 736 0 0 100 0 2 0 706052 147972 496 0 0 0 855 0 81 491 60244 1628 6 7 87 0 3 0 706456 114584 237 0 0 0 12094 10301 396 1162 15662 4454 1 3 95 2 1 0 706560 172896 879 0 0 0 13237 15463 410 1317 17773 4954 1 4 95 1 2 0 705072 131140 431 1 0 0 11914 9426 391 1096 14791 4204 1 3 96 0 3 0 705408 207584 338 0 0 0 11890 15461 389 1091 14699 4286 1 3 95 0 3 0 703808 215928 25 0 0 0 9965 10308 351 972 11946 3795 1 3 96 0 1 0 704916 201680 92 0 0 0 5981 5154 211 680 62050 2798 7 8 85 1 1 0 709872 206228 339 0 0 0 5037 5150 183 661 7084 2191 1 1 98


# iostat 5
      tty           aacd0             cpu
 tin tout  KB/t tps  MB/s  us ni sy in id
   0   16 96.21  44  4.17   0  0  1  0 99
   0   47 15.42  11  0.17   0  0  0  0 100
   0    9 111.87 246 26.83   1  0  2  0 97
   0    9 115.72 262 29.60   1  0  2  0 98
   0    9 122.42 344 41.14   1  0  2  0 96
   0    9 110.45  96 10.35   1  0  1  0 99
   0    9  2.67   1  0.00   0  0  0  0 100
   0    9 17.05   8  0.13   1  0  1  0 98
   0    9 21.89   4  0.08   0  0  0  0 100
   0    9 101.85  97  9.65   0  0  1  0 99
   0    9 37.27  10  0.36   1  0  0  0 99
   0    9  0.00   0  0.00   0  0  0  0 100
   0   79 11.98  22  0.26   1  0  0  0 99
   1  566 17.80   8  0.14   0  0  0  0 100
   0  357 19.56  13  0.24   0  0  0  0 100
   0   77  9.40   2  0.02   3  0  3  0 94
   2  272  7.07   6  0.04   1  0  1  0 98
   4  178 26.17  83  2.11   4  0  5  0 91
   1    9 13.15   9  0.12   0  0  1  0 98
   3   11 120.87 279 32.97   1  0  2  0 97
      tty           aacd0             cpu
 tin tout  KB/t tps  MB/s  us ni sy in id
   0  179 119.18 307 35.77   1  0  2  0 97
   0  237 119.75 353 41.25   2  0  3  0 96
   0  286 120.31 330 38.74   1  0  2  0 96
   1   30 96.41 382 35.92   1  0  2  0 97
   2   52 85.32 447 37.27   7  0  5  0 88
   0   39 87.55 402 34.40  10  0  4  0 86
   0    9 121.10 426 50.32   2  0  3  0 94
   0  119 115.22 393 44.16   2  0  2  0 95
   1 1003 113.15 358 39.59   1  0  3  0 96
   0  108 113.06 230 25.39   1  0  1  0 98
   0  148 92.30  69  6.20   0  0  1  0 99
   0  706 14.85   9  0.14   0  0  0  0 100
   0  188 26.69  18  0.47   0  0  0  0 100
   0 1309 108.58 234 24.81   4  0  4  0 92
   0  849 95.10 433 40.18   2  0  3  0 95
   0  152 119.58 349 40.77   1  0  3  0 96

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