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Hi. I'm new to the list and I'm here because a
have a huge problem... Straight to the point: I have one Apache like this
(apachectl -V):
Server version: Apache/2.0.52
Server built: Oct 7 2004 23:35:30 Server's Module Magic Number: 20020903:9 Architecture: 32-bit Server compiled with.... -D APACHE_MPM_DIR="server/mpm/prefork" -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 HTTPD_ROOT="/usr/local/etc/httpd" -D SUEXEC_BIN="/usr/local/etc/httpd/bin/suexec" -D DEFAULT_PIDLOG="logs/httpd.pid" -D DEFAULT_SCOREBOARD="logs/apache_runtime_status" -D DEFAULT_LOCKFILE="logs/accept.lock" -D DEFAULT_ERRORLOG="logs/error_log" -D AP_TYPES_CONFIG_FILE="conf/mime.types" -D SERVER_CONFIG_FILE="conf/httpd.conf" running on a Sun-Fire-480R server. This server has
a JBoss/Tomcat4.1.29 instance and acts as a (mod_jk) load balancer to
another JBoss/Tomcat4.1.29 instance. Running netstat -a show lots of
SYN_SENT connections as well as ESTABLISHED ones, but response times end up in
time outs or pages not shown at all. I guess that the user load is creating a
bottleneck, because -and please correct me if I'm wrong- I'm seeing
too many lines like this <PROCESS_NUMBER>
? 0:00 httpd when running a ps
-ae
Top shows mutiple-sleepy httpd
processes:
last pid: 13549; load averages:
3.66, 3.65,
3.71
16:44:35
203 processes: 199 sleeping, 2 running, 2 on cpu CPU states: 0.3% idle, 59.6% user, 40.1% kernel, 0.0% iowait, 0.0% swap Memory: 4096M real, 2939M free, 1192M swap in use, 6085M swap free PID USERNAME LWP PRI NICE
SIZE RES STATE TIME CPU
COMMAND
9918 root 1 10 0 43M 7336K run 148:40 33.60% Xsun 5586 root 1 10 0 1392K 1160K cpu/0 21.1H 32.42% nano 12171 root 124 21 0 707M 474M run 95:58 31.61% java 13549 root 1 59 0 2928K 1808K cpu/2 0:00 0.36% top 13547 root 1 59 0 4464K 2112K sleep 0:00 0.09% sshd 9425 root 1 59 0 2760K 2080K sleep 0:00 0.03% bash 7865 ccajina 1 59 0 5776K 1728K sleep 0:09 0.02% sshd 13397 nobody 1 59 0 7256K 2608K sleep 0:00 0.02% httpd 13475 nobody 1 59 0 7256K 2624K sleep 0:00 0.02% httpd 13411 nobody 1 59 0 7280K 2656K sleep 0:00 0.01% httpd 346 mysql 9 59 0 43M 28M sleep 13:07 0.00% mysqld 64 root 10 59 0 4824K 4008K sleep 3:31 0.00% picld 409 root 1 59 0 3056K 1664K sleep 0:27 0.00% sshd 244 root 23 59 0 7032K 3768K sleep 0:03 0.00% nscd 12492 root 1 59 0 7168K 4280K sleep 0:01 0.00% httpd I can't figure out why suddenly after a while (say 1/2 an hour) Apache
unbearable sits accepting connections but apparntly releasing very few.
Can anybody point out tips, tutorials, how-tos, personal
experiences, or any other resourse to help me understand what's going
on?
Any help... GREATLY appreciated...
Regards,
Carlos |
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