Hi,
We use Apache httpd 2.2.11 on Solaris 10 (Sparc).
I compiled httpd myself with the following options:
# ./httpd -V
Server version: Apache/2.2.11 (Unix)
Server built: Feb 5 2009 09:00:47
Server's Module Magic Number: 20051115:21
Server loaded: APR 1.3.3, APR-Util 1.3.4
Compiled using: APR 1.3.3, APR-Util 1.3.4
Architecture: 32-bit
Server MPM: Worker
threaded: yes (fixed thread count)
forked: yes (variable process count)
Server compiled with....
-D APACHE_MPM_DIR="server/mpm/worker"
-D APR_HAS_SENDFILE
-D APR_HAS_MMAP
-D APR_HAVE_IPV6 (IPv4-mapped addresses enabled)
-D APR_USE_FCNTL_SERIALIZE
-D APR_USE_PTHREAD_SERIALIZE
-D SINGLE_LISTEN_UNSERIALIZED_ACCEPT
-D APR_HAS_OTHER_CHILD
-D AP_HAVE_RELIABLE_PIPED_LOGS
-D DYNAMIC_MODULE_LIMIT=128
-D HTTPD_ROOT="/usr/local/apache2/"
-D SUEXEC_BIN="/usr/local/apache2/bin/suexec"
-D DEFAULT_SCOREBOARD="logs/apache_runtime_status"
-D DEFAULT_ERRORLOG="logs/error_log"
-D AP_TYPES_CONFIG_FILE="conf/mime.types"
-D SERVER_CONFIG_FILE="conf/httpd.conf"
Worker MPM settings:
<IfModule mpm_worker_module>
ServerLimit 64
StartServers 4
MaxClients 1024
MinSpareThreads 32
MaxSpareThreads 128
ThreadsPerChild 16
MaxRequestsPerChild 1024
</IfModule>
Sometimes the server load increases heavily, when looking at the processes, a few httpd are using quitte a lot of CPU.
Output top:
last pid: 19041; load avg: 8.09, 8.08, 8.07; up 65+18:17:24 10:12:08
65 processes: 59 sleeping, 6 on cpu
CPU states: 66.5% idle, 33.4% user, 0.1% kernel, 0.0% iowait, 0.0% swap
Memory: 3968M phys mem, 1402M free mem, 4097M total swap, 4097M free swap
PID USERNAME LWP PRI NICE SIZE RES STATE TIME CPU COMMAND
28877 daemon 4 0 0 12M 9640K cpu/4 62.3H 12.24% httpd
28625 daemon 4 0 0 12M 9448K cpu/11 62.3H 12.24% httpd
28551 daemon 2 0 0 12M 9336K cpu/17 20.8H 4.08% httpd
29187 daemon 2 0 0 12M 9400K cpu/21 20.8H 4.08% httpd
19041 root 1 50 0 3456K 2408K cpu/8 0:00 0.06% top
There are no errors in the error log.
When looking at the server-status, these pids are active.
28625 and 28877 have three threads with Mode of operation "W"
28551 and 29187 have one threads with Mode of operation "W"
All pids have no other threads, so it looks like a problem sending the reply to the client....
Any ideas on how to solve this?
Regards and TIA
Martijn
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