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From Michael Jeung <mje...@cisdata.net>
Subject [users@httpd] Apache 1.3 vs Apache 2
Date Wed, 07 Dec 2005 18:38:35 GMT
Good morning all,

Recently, we've migrated one of our production servers from a Linux  
box to a FreeBSD box.  We're running Apache 1.3.34, with a PHP/MySQL  
web application.  Listed below, you can find how apache has been  
compiled.

Yesterday afternoon, we put this new server into production and it  
seemed to be behaving relatively OK, with system-load of 4-5.  We  
thought everything was going well and that this issue was wrapped  
up.  Serves us right - today we got into the office and found that  
loads on our server had spiked to 150.

Before we pulled the server from production, we grabbed a few  
snapshots of what the system was doing.  After taking a look at  
these, I haven't been able to make much head-way.  If someone with  
more experience in this matter could take a look, I would greatly  
appreciate it.

Ultimately, my goal here is to get Apache to behave.  Any solution  
that will allow Apache to run without killing the server is  
acceptable -- including upgrading to Apache 2.  (Does Apache2  
outperform Apache 1.3?)


server# httpd -V
Server version: Apache/1.3.34 (Unix)
Server built:   Nov 28 2005 12:49:01
Server's Module Magic Number: 19990320:18
Server compiled with....
  -D EAPI
  -D EAPI_MM
  -D EAPI_MM_CORE_PATH="/var/run/httpd.mm"
  -D HAVE_MMAP
  -D USE_MMAP_SCOREBOARD
  -D USE_MMAP_FILES
  -D HAVE_FLOCK_SERIALIZED_ACCEPT
  -D SINGLE_LISTEN_UNSERIALIZED_ACCEPT
  -D DYNAMIC_MODULE_LIMIT=64
  -D HARD_SERVER_LIMIT=512
  -D SO_ACCEPTFILTER
  -D ACCEPT_FILTER_NAME="httpready"
  -D HTTPD_ROOT="/usr/local"
  -D SUEXEC_BIN="/usr/local/sbin/suexec"
  -D DEFAULT_PIDLOG="/var/run/httpd.pid"
  -D DEFAULT_SCOREBOARD="/var/run/httpd.scoreboard"
  -D DEFAULT_LOCKFILE="/var/run/httpd.lock"
  -D DEFAULT_ERRORLOG="/var/log/httpd-error.log"
  -D TYPES_CONFIG_FILE="etc/apache/mime.types"
  -D SERVER_CONFIG_FILE="etc/apache/httpd.conf"
  -D ACCESS_CONFIG_FILE="etc/apache/access.conf"
  -D RESOURCE_CONFIG_FILE="etc/apache/srm.conf"


This is vmstat during the problem -- note that CPU is 0% idle.
server# vmstat 1
procs      memory      page                    disks     faults      cpu
r b w     avm    fre  flt  re  pi  po  fr  sr da0 md0   in   sy  cs  
us sy id
56 115 0 4105968 293024 10839   6   0   0 10462  13   0   0  660 5051  
423  9  9 82
43 120 0 2559320 288348 75582  14   0   0 70335   0   0   0 1874  
23305 1700 74 25  0
39 126 0 3174044 281440 65374  66   0   0 60878   0  64   0 1712  
23361 1646 69 31  0
24 127 0 3171440 280976 24325 229   0   0 19744   0   1   0 2202  
47064 2373 74 26  0
25 128 0 3164152 288296 41649  74   0   0 39391   0   1   0 1573  
34180 1600 64 36  0
21 132 0 2649152 294112 66247 272   0   0 63361   0   1   0 1595  
22986 1938 64 36  0
21 129 0 1634504 282236 31834 668   0   0 28466   0  91   0 1588  
58544 2087 70 30  0
23 131 0 2243500 281344 56292  21   0   0 53558   0   1   0 1356  
34243 1669 58 42  0
19 133 0 2235948 285932 37381  12   0   0 36987   0   2   0 1547  
30101 1784 72 28  0
32 134 0  798396 295432 34687   4   0   0 36695   0   0   0 1079 2982  
246  6 94  0
31 135 0 1312772 294476 202898   0   0   0 196045   0  12   0 1357  
16086 1242 21 79  0
16 138 0 1325712 285204 90288  16   0   0 85205   0   8   0 1257  
19917 1297 50 50  0
16 138 0 3459864 290800 48865  10   0   0 48583   0   2   0 1365  
26674 1655 62 38  0
22 135 0 1415696 282132 62415   5   0   0 57784   0   1   0 1123  
36272 1230 57 43  0
22 137 0 1390288 295284 90665   8   0   0 88675   0   2   0 1800  
32413 2110 50 50  0
23 135 0 3550672 289536 29287  11   0   0 21393   0   0   0 1694  
21543 1810 76 24  0


Our first top output:

last pid: 62787;  load averages: 56.24, 105.03,  
121.49                                                                   
                   up 0+21:28:37  08:42:36
388 processes: 58 running, 314 sleeping, 16 zombie
CPU states: 19.3% user,  0.0% nice, 80.4% system,  0.4% interrupt,   
0.0% idle
Mem: 1803M Active, 1349M Inact, 343M Wired, 124M Cache, 199M Buf,  
278M Free
Swap: 8000M Total, 8000M Free

   PID USERNAME PRI NICE  SIZE    RES STATE  C   TIME   WCPU    CPU  
COMMAND
36765 httpd     63   0   507M    68K RUN    0   0:39 10.69% 10.69% httpd
43430 httpd     60   0   505M    56K RUN    0   0:40  3.27%  3.27% httpd
60922 httpd     51   0   506M   122M RUN    0   0:02  2.69%  2.69% httpd
38828 httpd     51   0   507M  7152K RUN    1   0:32  2.34%  2.34% httpd
51672 httpd      2   0   507M    56K sbwait 0   0:19  2.10%  2.10% httpd
51040 httpd      2   0   506M    88K sbwait 0   0:26  1.95%  1.95% httpd
43457 httpd     50   0   507M 15508K RUN    1   0:33  1.56%  1.56% httpd
39021 httpd      2   0   505M   118M sbwait 0   0:44  1.27%  1.27% httpd
39007 httpd     46   0   507M   123M RUN    0   0:49  0.93%  0.93% httpd
36636 httpd      2   0   516M   122M sbwait 0   0:42  0.93%  0.93% httpd
50650 httpd      2   0   504M    56K sbwait 1   0:28  0.93%  0.93% httpd
43472 httpd      2   0   506M   122M sbwait 0   0:39  0.88%  0.88% httpd
50870 httpd      2   0   505M  6364K sbwait 0   0:24  0.88%  0.88% httpd
60806 httpd      2   0   504M   120M sbwait 0   0:01  0.88%  0.88% httpd
18704 httpd      2   0   508M    56K sbwait 0   1:04  0.83%  0.83% httpd
46300 httpd      2   0   504M   117M sbwait 1   0:26  0.83%  0.83% httpd
49956 httpd      2   0   506M   117M sbwait 1   0:25  0.83%  0.83% httpd
50868 httpd     52   0   507M   121M RUN    1   0:19  0.83%  0.83% httpd
43442 httpd     54   0   507M 43436K RUN    0   0:44  0.78%  0.78% httpd
43445 httpd      2   0   507M   122M sbwait 0   0:42  0.78%  0.78% httpd
46328 httpd      2   0   505M   121M sbwait 0   0:26  0.78%  0.78% httpd
...


Thanks,
Michael Jeung


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