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Qmail going nuts

Question

Hi,
Qmail on one of my servers has been using about 100% of the CPU for a few days now

3244 admin 17 0 332 332 276 D 3.1 0.0 0:00 qmail-local
3263 admin 15 0 336 336 276 D 3.1 0.0 0:00 qmail-local
3230 admin 14 0 336 336 276 D 2.9 0.0 0:00 qmail-local
3286 admin 16 0 336 336 276 D 2.9 0.0 0:00 qmail-local
1346 admin 14 0 332 332 276 D 2.5 0.0 0:01 qmail-local
3010 admin 15 0 336 336 276 R 2.5 0.0 0:00 qmail-local
3210 admin 14 0 336 336 276 R 2.5 0.0 0:00 qmail-local
3252 admin 13 0 336 336 276 D 2.5 0.0 0:00 qmail-local
3296 admin 14 0 336 336 276 D 2.5 0.0 0:00 qmail-local
3300 admin 14 0 332 332 276 D 2.5 0.0 0:00 qmail-local
3315 admin 14 0 336 336 276 R 2.5 0.0 0:00 qmail-local
1272 admin 14 0 336 336 276 R 2.3 0.0 0:01 qmail-local
1273 admin 13 0 336 336 276 D 2.3 0.0 0:01 qmail-local
3243 admin 13 0 336 336 276 D 2.3 0.0 0:00 qmail-local
3251 admin 14 0 336 336 276 D 2.3 0.0 0:00 qmail-local
3029 admin 15 0 332 332 276 D 2.1 0.0 0:00 qmail-local
1963 admin 13 0 336 336 276 R 1.9 0.0 0:01 qmail-local
3094 admin 13 0 336 336 276 D 1.9 0.0 0:00 qmail-local
2549 admin 13 0 336 336 276 D 1.7 0.0 0:00 qmail-local
3358 admin 15 0 332 332 276 D 1.3 0.0 0:00 qmail-local
2978 qmaild 13 0 1216 1212 968 S 0.7 0.0 0:00 qmail-smtpd

The queue looks normal


messages in queue: 17
messages in queue but not yet preprocessed: 0

Any ideas what I can do?

Answer

Check users quotas and messages size in queue. I had a such cases years ago - qmail were trying to big messages to overquoted user's box and it makes him consume all CPU...