On Fri, Mar 08, 2013 at 09:09:27AM -0500, David F. Skoll wrote:
> 
> I think that's what I said originally... but was met with skepticism from
> some.

There is a difference in saying something and actually providing some data. 
I'm sorry but this sounds like "True Believers" (no need to prove anything)
vs "Scepticists" (no matter what you prove, it doesn't matter to them). :-)

Here is my full documentation. I don't really care if you are on sa-users
list and claim to not even have access to spamd, but if we keep going, let's
base the claims on hard data?  If MD behaves differently, that's another
matter and not relevant to SA.


$ uname -a
Linux ubuntu 3.2.0-35-generic #55-Ubuntu SMP Wed Dec 5 17:42:16 UTC 2012 x86_64 
x86_64 x86_64 GNU/Linux

$ /usr/local/perl/bin/perl -v
This is perl 5, version 16, subversion 2 (v5.16.2) built for x86_64-linux

$ free
             total       used       free     shared    buffers     cached
Mem:       4049584    3593572     456012          0     290380    1636144
-/+ buffers/cache:    1667048    2382536
Swap:            0          0          0

(even disabled swap so it doesn't interfere)

$ /usr/local/perl/bin/spamd -4 -p 1234 -m 50 --min-children=50 --min-spare=40 
--max-conn-per-child=1000 --round-robin -L -d

$ pgrep -f spamd |wc -l
51

$ free
             total       used       free     shared    buffers     cached
Mem:       4049584    3730644     318940          0     290396    1636152
-/+ buffers/cache:    1804096    2245488
Swap:            0          0          0

(memory difference to before spamd running: 137MB)

$ pgrep -f 'spamd child' | while read p; do grep Private_ /proc/$p/smaps; done 
|  awk 'BEGIN {p=0;} $1 ~ /Private_/ {p += $2;} END {print p;}'
78700

(smaps claims virgin childs are using 78MB / 50 = ~1.5MB/child)

$ find ham.old -type f | while read f; do spamc -p 1234 < $f; done
(zzz..... about 25 messages processed per child)

$ ps axu |grep spamd
hege     23755  0.2  1.0 121608 44244 ?        Ss   17:23   0:01 
/usr/local/perl/bin/spamd -4 -p 1234 -m 50 --min-children=50 --min-spare=40 
--max-conn-per-child=1000 --round-robin -L -d
hege     23756  2.1  1.2 129400 52400 ?        S    17:23   0:09 spamd child
hege     23757  2.0  1.3 130432 53284 ?        S    17:23   0:09 spamd child
hege     23758  1.0  1.2 127168 50244 ?        S    17:23   0:04 spamd child
hege     23759  0.9  1.2 129636 52628 ?        S    17:23   0:04 spamd child
hege     23760  1.0  1.2 127984 50960 ?        S    17:23   0:04 spamd child
hege     23761  1.2  1.3 130204 53080 ?        S    17:23   0:05 spamd child
hege     23762  1.1  1.2 128312 51324 ?        S    17:23   0:05 spamd child
hege     23763  1.4  1.2 126356 49512 ?        S    17:23   0:06 spamd child
hege     23764  0.9  1.2 128636 51408 ?        S    17:23   0:04 spamd child
hege     23765  1.2  1.2 129112 52056 ?        S    17:23   0:05 spamd child
hege     23766  1.1  1.2 128048 51068 ?        S    17:23   0:05 spamd child
hege     23767  1.0  1.2 127604 50588 ?        S    17:23   0:04 spamd child
hege     23768  1.2  1.2 129244 52376 ?        S    17:23   0:05 spamd child
hege     23769  0.9  1.2 128680 51632 ?        S    17:23   0:04 spamd child
hege     23770  1.8  1.3 133168 56184 ?        S    17:23   0:08 spamd child
hege     23771  0.8  1.2 129112 52096 ?        S    17:23   0:03 spamd child
hege     23772  0.6  1.2 128268 51220 ?        S    17:23   0:03 spamd child
hege     23773  2.4  1.3 132232 55132 ?        S    17:23   0:11 spamd child
hege     23774  1.3  1.2 129260 52288 ?        S    17:23   0:06 spamd child
hege     23775  1.0  1.3 130308 53360 ?        S    17:23   0:04 spamd child
hege     23776  1.8  1.2 126960 49876 ?        S    17:23   0:08 spamd child
hege     23777  1.0  1.2 128608 51692 ?        S    17:23   0:04 spamd child
hege     23778  0.9  1.2 127232 50248 ?        S    17:23   0:04 spamd child
hege     23779  1.5  1.2 128808 51936 ?        S    17:23   0:07 spamd child
hege     23780  1.1  1.3 131680 54504 ?        S    17:23   0:05 spamd child
hege     23781  1.5  1.2 126596 49760 ?        S    17:23   0:07 spamd child
hege     23782  1.0  1.3 130636 53632 ?        S    17:23   0:04 spamd child
hege     23783  1.0  1.3 130816 53716 ?        S    17:23   0:04 spamd child
hege     23784  1.7  1.3 132872 55820 ?        S    17:23   0:08 spamd child
hege     23785  0.8  1.3 131696 54608 ?        S    17:23   0:03 spamd child
hege     23786  2.1  1.3 130104 53208 ?        S    17:23   0:10 spamd child
hege     23787  1.1  1.3 130940 53892 ?        S    17:23   0:05 spamd child
hege     23788  1.0  1.3 130116 52932 ?        S    17:23   0:04 spamd child
hege     23789  1.3  1.3 132556 55388 ?        S    17:23   0:06 spamd child
hege     23790  0.8  1.2 127744 50784 ?        S    17:23   0:04 spamd child
hege     23791  1.1  1.2 125812 48984 ?        S    17:23   0:05 spamd child
hege     23792  1.6  1.3 129812 52804 ?        S    17:23   0:07 spamd child
hege     23793  0.8  1.3 132040 55036 ?        S    17:23   0:04 spamd child
hege     23794  0.6  1.3 129804 52684 ?        S    17:23   0:02 spamd child
hege     23795  0.7  1.2 126640 49556 ?        S    17:23   0:03 spamd child
hege     23796  1.3  1.3 130160 53064 ?        S    17:23   0:06 spamd child
hege     23797  1.1  1.3 131008 53920 ?        S    17:23   0:05 spamd child
hege     23798  1.1  1.3 131016 54120 ?        S    17:23   0:05 spamd child
hege     23799  0.8  1.2 127944 50912 ?        S    17:23   0:03 spamd child
hege     23800  1.3  1.3 132756 55668 ?        S    17:23   0:06 spamd child
hege     23801  1.4  1.2 128584 51584 ?        S    17:23   0:06 spamd child
hege     23802  1.2  1.2 127664 50620 ?        S    17:23   0:05 spamd child
hege     23803  1.0  1.3 131188 54052 ?        S    17:23   0:04 spamd child
hege     23804  1.4  1.3 132212 55240 ?        S    17:23   0:06 spamd child
hege     23805  0.9  1.1 125060 48076 ?        S    17:23   0:04 spamd child

$ free
             total       used       free     shared    buffers     cached
Mem:       4049584    3944384     105200          0     268060     653584
-/+ buffers/cache:    3022740    1026844
Swap:            0          0          0

(memory difference to before spamd running: 1220MB)

$ pgrep -f 'spamd child' | while read p; do grep Private_ /proc/$p/smaps; done 
|  awk 'BEGIN {p=0;} $1 ~ /Private_/ {p += $2;} END {print p;}'
1350324

(so smaps reports slightly little higher usage, ~27MB per child)

$ pkill -f spamd

$ free
             total       used       free     shared    buffers     cached
Mem:       4049584    2536460    1513124          0     268172     653612
-/+ buffers/cache:    1614676    2434908
Swap:            0          0          0

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