Mailscanner and server load
kfliong
kfliong at WOFS.COM
Fri Aug 27 07:42:44 IST 2004
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Thanks for the replies guys. I can learn a lot from all your comments.
Anyway, here are more info on my system.
Around 50,000 mails per day of which 95% are SPAMS. I am currently using
list.dsbl.org on my sendmail.cf to which is helping a little to kill off
mails before they can come into my server. But it have false identification
which is causing some users unable to send mail using SMTP, that's why I
need to rely on SURBL and remove dsbl on MTA.
I was using only bigevil previously and since SURBL will replace bigevil, I
have removed bigevil.
A recap of my system specs :
Celeron 1.3GHz, 512mb RAM, 60gb hdd, redhat 7.3, mailscanner+SA+clamav (all
latest stable version)
And I do not run any DNS server. But will do that once I upgraded my box to
fedora core 1 and ensim pro 4.0.1.
For now, I want to know if I should upgrade to 1GB RAM.
Here are my loads :
procs memory swap io system
cpu
r b w swpd free buff cache si so bi bo in cs us
sy id
4 0 1 318036 29432 22700
116600 48 86 6 85 18 98 31 15 54
2 0 0 317564 37516 22784
116796 0 48 84 664 395 309 54 46 0
8 0 0 317560 41960 22964
117188 16 0 256 1066 494 539 60 37 2
8 0 0 317560 10104 22996
117324 20 40 84 296 342 283 72 28 0
1 10 1 317632 5400 23032 115168 22
1180 72 1520 514 219 43 15 42
0 24 2 318244 5304 22768 113568 88
1558 144 1766 531 215 6 5 89
14 8 2 319088 5304 22824 111548 38
1668 136 1878 619 261 4 5 91
0 17 2 319364 5304 22824 108176 178
1226 208 1368 462 242 10 10 80
21 5 2 319808 5308 22820 106608 176
1114 232 1270 481 335 13 8 79
0 13 1 320048 23256 22816 104052 446
864 508 1064 450 356 12 11 77
10 6 2 320220 5304 22984 103500 550 624 622 1456 556 563 58 15 27
9 5 2 320792 5400 22996 101436 166
1000 186 1160 363 239 36 11 53
4 12 2 321136 5296 22972 98536 348
1276 358 1466 428 311 49 13 38
6 10 1 320968 13900 22988 97416 288
766 304 1112 353 280 62 9 29
3 13 1 321464 7692 23072 97532 292
310 382 722 282 339 38 12 50
2 11 1 320416 25700 23132 97708 344
162 440 442 363 415 30 14 56
And here is the top command :
2:16pm up 3 days, 22:53, 1 user, load average: 6.34, 6.06, 4.96
181 processes: 178 sleeping, 3 running, 0 zombie, 0 stopped
CPU states: 6.9% user, 6.9% system, 60.8% nice, 25.2% idle
Mem: 506048K av, 458944K used, 47104K free, 0K shrd, 24508K buff
Swap: 1020116K av, 315784K used, 704332K free 124892K cached
<SORT BY MEMORY>
PID USER PRI NI SIZE RSS SHARE STAT %CPU %MEM TIME COMMAND
1140 mysql 15 10 19040 13M 1524 S N 0.0 2.7 0:29 mysqld
1160 mysql 11 10 19040 13M 1524 S N 0.4 2.7 0:36 mysqld
1161 mysql 15 10 19040 13M 1524 S N 0.0 2.7 0:00 mysqld
1162 mysql 15 10 19040 13M 1524 S N 0.0 2.7 0:00 mysqld
2487 mysql 15 10 19040 13M 1524 S N 0.0 2.7 0:00 mysqld
3120 mysql 15 10 19040 13M 1524 S N 0.0 2.7 0:00 mysqld
6240 mysql 15 10 19040 13M 1524 S N 0.0 2.7 0:00 mysqld
6460 mysql 15 10 19040 13M 1524 S N 0.0 2.7 0:00 mysqld
6465 mysql 15 10 19040 13M 1524 S N 0.0 2.7 0:00 mysqld
6468 mysql 15 10 19040 13M 1524 S N 0.0 2.7 0:00 mysqld
6480 mysql 15 10 19040 13M 1524 S N 0.0 2.7 0:00 mysqld
6539 mysql 15 10 19040 13M 1524 S N 0.0 2.7 0:00 mysqld
31864 root 9 0 42128 10M 1692 S 0.0 2.1 0:31 MailScanner
32413 root 8 0 42184 10M 1656 S 0.0 2.1 0:30 MailScanner
31892 root 8 0 42312 9M 1648 S 0.0 2.0 0:32 MailScanner
31846 root 9 0 42196 9928 1684 S 0.0 1.9 0:29 MailScanner
31932 root 8 0 42172 9844 1656 S 0.0 1.9 0:32 MailScanner
<SORT BY CPU>
PID USER PRI NI SIZE RSS SHARE STAT %CPU %MEM TIME COMMAND
6647 root 20 0 42332 19M 1816 R 5.9 3.9 0:00 MailScanner
4653 apache 9 0 10924 5708 3216 R 4.4 1.1 0:01 httpd
5264 apache 9 0 12080 7528 3836 S 4.4 1.4 0:00 httpd
6433 apache 11 0 11840 7044 3756 S 2.4 1.3 0:00 httpd
31864 root 15 0 42132 10M 1692 S 1.9 2.1 0:32 MailScanner
6046 apache 8 0 11128 6352 3632 S 1.4 1.2 0:00 httpd
13 root 9 0 0 0 0 RW 0.4 0.0 6:53 kjournald
21042 root 9 0 2004 1656 1252 R 0.4 0.3 0:20 sshd
31932 root 12 0 42180 9104 1656 S 0.4 1.7 0:32 MailScanner
6383 apache 9 0 11552 6748 3788 S 0.4 1.3 0:00 httpd
6582 root 10 0 1156 1156 836 R 0.4 0.2 0:00 top
6645 mysql 15 10 18876 13M 1524 S N 0.4 2.7 0:00 mysqld
6649 root 15 0 42132 10M 1692 R 0.4 2.1 0:00 MailScanner
1 root 8 0 456 412 392 S 0.0 0.0 0:08 init
2 root 9 0 0 0 0 SW 0.0 0.0 0:00 keventd
3 root 9 0 0 0 0 SW 0.0 0.0 0:00 kapmd
4 root 19 19 0 0 0 SWN 0.0 0.0 0:00 ksoftirqd_CPU0
Please bear in mind that I have turned off 3 out of the 4 filtering in
spamcop_uri.cf.
Also, bayes is turned on. Max children is 5.
Thanks in advance.
At 04:41 PM 26/8/2004, you wrote: Hi!
> I have just implemented SURBL. Server load shot up and stays around 30 >
making websites unaccessable. I have now edited SURBL to only check on >
SPAMCOP_URI_RBL. I have disabled the other 3. Now my load averages around >
12. This is still quite high. > > BTW, after some monitoring using "top", I
notice that my system is quite > RAM intensive. But "top" can't tell for
sure. What other tools can I use to > see whether the highload is due to
lots of disk accesses (due to not having > enough RAM).
This question would be more in its place on the SURBL mailinglists i think.
But, do you have local caching servers for the DNS zones ? And, whats the
mailvolume and machine specs you are using ?
Bye, raymond.
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