DCC chewing up cpu time

John L johnl@iecc.com
Sat Oct 13 05:57:49 UTC 2007


My dcc daemon has of late been close to compute bound, currently using 
about 80% of my 3GHz server.  It's FreeBSD 6.2, 1GB process size on a 2GB 
machine.  Recently upgraded from 1.3.59 to 1.3.64 which made no 
difference.

Any suggestions?  Here's a pair of cdcc status outputs a minute apart.
The enormous numbers of dup and white entries are rather odd.  The
number of locally generated entries is not large, maybe 20 a minute.

208.31.42.55,6277
         server-ID 1107  map  01:55:44
     version 1.3.64  Q-mode  tracing ANON CLNT 
15495160 hash entries 9601003 used 860501388 DB bytes
     0 ms delay  46 NOPs  44 ADMN  0 query  4 clients in 24 hours
    4368 reports       3>10       0>100       0>1000       0 many
         answers    1313>10     920>100     716>1000     704 many
     0 bad IDs    0 passwds   0 error responses    94 retransmitted
     0 answers rate-limited   0 anonymous           0 rejected reports
     flood on   4 streams   4 out active 3 in 956703953 total flooded in
5587832 accepted   0 stale 951116078 dup  1212137513 white    0 delete
5592334 reports added between Oct 12 12:37:30.959929 EDT and Oct 13 01:55:44

208.31.42.55,6277
         server-ID 1107  map  01:56:44
     version 1.3.64  Q-mode  tracing ANON CLNT 
15495160 hash entries 9604437 used 860796696 DB bytes
     0 ms delay  46 NOPs  45 ADMN  0 query  4 clients in 24 hours
    4385 reports       3>10       0>100       0>1000       0 many
         answers    1314>10     921>100     717>1000     705 many
     0 bad IDs    0 passwds   0 error responses    94 retransmitted
     0 answers rate-limited   0 anonymous           0 rejected reports
     flood on   4 streams   4 out active 3 in 970047582 total flooded in
5590419 accepted   0 stale 964457120 dup  1213350335 white    0 delete
5594939 reports added between Oct 12 12:37:30.959929 EDT and Oct 13 01:56:44



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