Full_Name:
Version: mod_ssl-2.2.4-1.3.4
OS: Linux2.2.2/Glibc2.1
Submission from: john.rightline.com (208.215.20.141)
I have been succesfully running mod_ssl-2.0.13-1.3.3 and looking at upgrading to
the current mod_ssl-2.2.4-1.3.4 and have discovered the following:
1) Memory usage for each child in my configuration goes from 2536KB to 6232KB.
Is there an explanation for this?
2) Child processes randomly hang and consume a large amount of CPU.
7:49pm up 7 days, 3:25, 1 user, load average: 1.00, 1.01, 0.98
65 processes: 63 sleeping, 2 running, 0 zombie, 0 stopped
CPU states: 37.3% user, 12.8% system, 0.0% nice, 49.8% idle
CPU0 states: 10.4% user, 4.4% system, 0.0% nice, 84.0% idle
CPU1 states: 63.4% user, 21.0% system, 0.0% nice, 14.4% idle
Mem: 258172K av, 254996K used, 3176K free, 254260K shrd, 154936K buff
Swap: 130748K av, 0K used, 130748K free 59908K cached
PID USER PRI NI SIZE RSS SHARE LC STAT %CPU %MEM TIME COMMAND
4790 www 15 0 6512 6512 6244 0 R 49.6 2.5 108:19 httpd
4821 root 2 0 816 816 648 0 R 0.5 0.3 1:13 top
1 root 0 0 164 164 140 0 S 0.0 0.0 0:03 init
2 root 0 0 0 0 0 0 SW 0.0 0.0 0:03 kflushd
3 root 0 0 0 0 0 0 SW 0.0 0.0 0:00 kpiod
Apache Server Status for 209.221.152.198
Server Version: Apache/1.3.4 (Unix) FrontPage/3.0.4.2 mod_ssl/2.2.4
SSLeay/0.9.0b
Server Built: Mar 12 1999 17:51:38
--------------------------------------------------------------------------------
Current Time: Friday, 12-Mar-1999 20:26:00 PST
Restart Time: Friday, 12-Mar-1999 17:56:50 PST
Server uptime: 2 hours 29 minutes 10 seconds
Total accesses: 151 - Total Traffic: 563 kB
CPU Usage: u1.17 s.3 cu1.96 cs.12 - .0397% CPU load
.0169 requests/sec - 64 B/second - 3817 B/request
2 requests currently being processed, 37 idle servers
__K________________________W___________.........................
................................................................
................................................................
................................................................
Scoreboard Key:
"_" Waiting for Connection, "S" Starting up, "R" Reading Request,
"W" Sending Reply, "K" Keepalive (read), "D" DNS Lookup,
"L" Logging, "G" Gracefully finishing, "." Open slot with no current process
Srv PID Acc M CPU SS Req Conn Child Slot Client VHost Request
0 4788 0/4/4 _ 0.03 8886 4 0.0 0.01 0.01 32.100.222.178 secure.solidweb.com
GET /~mthoodinn/images/skifree2.gif HTTP/1.0
1 4789 0/6/6 _ 0.12 8540 3 0.0 0.03 0.03 171.213.153.74 secure.solidweb.com
GET /~www_vitalogysoft_com/orangemicro/logo.gif HTTP/1.1
2 4790 5/5/5 K 0.11 8697 3 20.1 0.02 0.02 208.215.20.141 secure.solidweb.com
GET /server-status HTTP/1.1
ps -ax
4781 ? S 0:00 /usr/local/apache/bin/httpd -DSSL
4787 ? S 0:00 /www/scripts/pipelogc
4901 p1 R 0:00 ps -ax
10618 ? S 0:12 /usr/local/sbin/sshd -b 1024
10620 p1 S 0:00 -bash
29632 ? S 0:12 ntpd
66 ? S 0:00 rpc.portmap
4788 ? S 0:00 /usr/local/apache/bin/httpd -DSSL
4789 ? S 0:00 /usr/local/apache/bin/httpd -DSSL
4790 ? R 145:44 /usr/local/apache/bin/httpd -DSSL
4791 ? S 0:00 /usr/local/apache/bin/httpd -DSSL
4792 ? S 0:00 /usr/local/apache/bin/httpd -DSSL
There are absolutely no errors in my error_log.
I can kill the runaway child and it will happen again within a few minutes of
being accessed. It doesn't happen on every access.
Here is a copy of a post off of comp.infosystems.www.servers.unix:
Using apache 1.3.4 and mod_ssl-2.2.4-1.3.4, openssl_0.9.1c under
Linux 2.1.36. I understand that cpu usage will be higher because of
encryption overhead.
The problem is that after a client connects via SSL, the httpd
process consumes all available cpu, and the system load goes
to 1.00. This occurs even when the client is idle.
This tells me it is not only on a 2.2.2 kernel or glibc-2.1.
I have compiled it against openssl as well as SSLeay with the same results.
Also, I have tried it without frontpage.
I am building another test platform based on RedHat5.2 to see if I have the same
problem and will make another post later on the results.
Please let me know if there is any further information needed.
MostToys
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