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Subject2.4.17 still croaks under heavy load
Date
Have a webserver running Zope (specifically the ZEO db) which dies every
few days with no messages in syslog. Locks up so tight a powercycle is
required to recover. System has 1gb RAM, 2xSMP, kernel configured with
4gb highmem.

Since the kernel doesn't provide any info in syslog when it dies, I just
ran a vmstat 30 to a file and waited for the next untimely demise.
Here's what happened when it died last time. Note the sudden surge in
disk activity (bi)

procs memory swap io system
cpu
r b w swpd free buff cache si so bi bo in cs us
sy id
0 1 0 33312 10356 5252 696940 0 0 20 1 1649 1603 6
2 92
0 1 0 33312 10352 5236 696564 0 0 26 3 1593 1548 3
2 94
0 1 0 33312 10276 5236 696600 0 0 9 1 1639 1596 5
2 92
0 2 0 33312 16932 5236 694304 0 0 11 3 1702 1709 7
4 89
0 1 0 33312 12644 5236 698784 0 0 10 2 1560 1513 3
2 95
0 1 0 33312 10456 5236 700600 0 0 14 3 1487 1443 6
2 93
0 1 0 33504 10452 5236 700652 0 1 3 1 1806 1785 5
2 92
0 1 0 33504 10468 5236 699992 0 0 5 3 2118 2116 6
3 91
0 1 0 33692 10484 5232 699312 0 5 1 8 3146 3215 7
5 88
1 0 0 33692 10544 5232 698832 0 1 0 3 3377 3457 10
5 85
1 0 0 33692 10468 5232 697804 0 3 2 3 3636 3721 8
5 87
1 0 0 33692 10420 5232 697876 0 2 2 4 1662 1609 35
3 63
1 0 0 33692 9540 5232 698940 0 0 7 1 752 624 46
2 52
1 0 0 33692 9592 5232 698900 0 1 6 4 397 372 50
1 49
1 0 0 33692 9504 5232 698980 0 0 2 1 136 284 49
1 49
1 0 0 33692 9492 5292 698992 0 3 741 4 215 467 50
1 49
1 0 0 34000 12624 5296 695936 0 6 547 10 236 408 49
1 49
1 0 0 34000 21912 5300 678984 1 0 499 6 1992 2112 55
7 38
1 0 0 34000 9976 5300 693104 0 0 517 13 320 413 49
1 49
1 0 0 34000 11916 5300 691128 1 0 561 3 289 413 53
1 46
1 0 0 34000 10172 5296 692100 0 0 497 5 288 374 49
1 49
1 0 0 34000 22012 5296 680216 0 0 556 1 309 421 50
1 49
1 0 0 34000 9544 5296 692804 0 0 584 3 306 433 50
1 49
1 0 0 34000 10816 5296 696748 0 0 469 1 414 522 51
3 46
<death>

I'd be more than willing to collect any other data required here, just
let me know what would be of assistance. Note though that I only have
remote access to this box, so getting magic sysrq info could be
difficult/impossible (tho I do have console access if that helps).

Thanks,

Phil Oester

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