I have a task: Calling a script by curl every ten seconds.
For that I do:
Create bash-script: admin_cron.sh
#!/bin/bash
while :; do
sleep 10
flock -n /var/www/admin/data/cron_lock -c \
'curl -m 3 "http://url.com/?mod=kasdim_robot_cron&server=true"' &
done
Add rule in crontab:
*/1 * * * * flock -n /var/www/admin/data/admin_lock -c /var/www/admin/data/admin_cron.sh
So, cron will start admin_cron.sh every minute if the file admin_lock is free. Then, if admin_cron.sh is terminated or dies, admin_cron.sh starts again. It's ok.
admin_cron.sh tries to call every 10 sec my URL through curl. Max time for curl is three seconds.
Problem: when I start, everything works fine for about two to three days; after, I see in the htop util that admin_cron.sh is hover process:
at start time:
CPU[ 0.0%] Tasks: 61, 53 thr; 1 running
Mem[||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||461M/996M] Load average: 0.44 0.83 0.94
Swp[ 0K/0K] Uptime: 86 days, 18:43:58
PID USER PRI NI VIRT RES SHR S CPU% MEM% TIME+ Command
707 root 20 0 29600 2828 2512 S 0.0 0.3 1:27.18 ├─ /usr/sbin/cron -f
22150 root 20 0 48868 2864 2416 S 0.0 0.3 0:00.00 │ └─ /usr/sbin/CRON -f
22151 admin 20 0 4288 720 648 S 0.0 0.1 0:00.00 │ └─ /bin/sh -c flock -n /var/www/admin/data/admin_lock -c /var/www/admin/data/admin_cron.sh
22156 admin 20 0 10044 816 728 S 0.0 0.1 0:00.00 │ └─ flock -n /var/www/admin/data/admin_lock -c /var/www/admin/data/admin_cron.sh
22161 admin 20 0 4288 764 692 S 0.0 0.1 0:00.00 │ └─ /bin/sh -c /var/www/admin/data/admin_cron.sh
22167 admin 20 0 11132 2896 2648 S 0.0 0.3 0:00.00 │ └+ /bin/bash /var/www/admin/data/admin_cron.sh
After some time:
CPU[|||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||100.0%] Tasks: 64, 53 thr; 2 running
Mem[||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||||466M/996M] Load average: 1.00 1.00 1.00
Swp[ 0K/0K] Uptime: 86 days, 18:42:30
PID USER PRI NI VIRT RES SHR S CPU% MEM% TIME+ Command
707 root 20 0 29600 2828 2512 S 0.0 0.3 1:27.18 ├─ /usr/sbin/cron -f
25818 root 20 0 48868 2864 2416 S 0.0 0.3 0:00.00 │ └─ /usr/sbin/CRON -f
25819 admin 20 0 4288 752 676 S 0.0 0.1 0:00.00 │ └─ /bin/sh -c flock -n /var/www/admin/data/admin_lock -c /var/www/admin/data/admin_cron.sh
25821 admin 20 0 10044 800 712 S 0.0 0.1 0:00.00 │ └─ flock -n /var/www/admin/data/admin_lock -c /var/www/admin/data/admin_cron.sh
25824 admin 20 0 4288 788 716 S 0.0 0.1 0:00.00 │ └─ /bin/sh -c /var/www/admin/data/admin_cron.sh
25825 admin 20 0 12636 4260 2552 R 98.7 0.4 60h56:25 │ └─ /bin/bash /var/www/admin/data/admin_cron.sh
Where is my problem?
Related
The command '(sleep 4 ; echo q) | topas -P |tee /tmp/top' on AIX produces this output in a command text file and I am not able to remove the blank spaces from it. I have tried, sed/perl and awk commands to print only the lines containing characters however nothing has helped. Do I need to convert this file to a ASCII text format to use sed/per/grep or awk to remove the empty lines?.
$ file /tmp/top
/tmp/top: commands text
$ head -n33 /tmp/top
DATA TEXT PAGE PGFAULTS
USER PID PPID PRI NI RES RES SPACE TIME CPU% I/O OTH COMMAND
root 9044256 20447712 60 20 2.43M 304K 2.43M 0:00 2.1 0 253 topas
root 14942646 8913178 60 20 72.0M 37.8M 72.0M 0:42 0.2 0 1 TaniumCl
root 20447712 21889434 60 20 148K 312K 508K 0:00 0.2 0 0 ksh
root 21955056 20447712 60 20 216K 36.0K 216K 0:00 0.1 0 3 sed
root 24838602 20447712 60 20 120K 8.00K 120K 0:00 0.1 0 1 tee
root 9830690 10355194 60 20 120K 4.00K 120K 0:00 0.1 0 0 sleep
root 12255642 13893896 60 41 57.5M 39.8M 57.5M 33:42 0.1 0 0 mmfsd
root 10355194 20447712 60 20 148K 312K 508K 0:00 0.1 0 0 ksh
root 9109790 4063622 39 20 12.9M 3.68M 12.9M 5:19 0.1 0 0 rmcd
root 13697394 4063622 60 20 8.27M 55.9M 8.27M 17:18 0.1 0 0 backup_a
root 20906328 1 60 20 1.81M 0 1.81M 3:15 0.0 0 0 nfsd
root 4260244 1 60 20 620K 88.0K 620K 41:23 0.0 0 0 getty
root 1573172 0 37 41 960K 0 960K 15:17 0.0 0 0 gil
nagios 9240876 4063622 60 20 23.7M 736K 23.7M 9:43 0.0 0 0 ncpa_pas
root 4391332 1 60 20 12.5M 252K 12.5M 4:43 0.0 0 0 secldapc
a_RTHOMA 8323456 12059082 60 20 636K 3.06M 1016K 0:00 0.0 0 0 sshd
root 8388902 4063622 60 20 1.76M 1.05M 1.76M 7:03 0.0 0 0 clcomd
root 3539312 1 60 20 448K 0 448K 5:07 0.0 0 0 lock_rcv
root 3670388 1 60 20 448K 0 448K 4:18 0.0 0 0 sec_rcv
root 5767652 4063622 48 8 392K 324K 392K 2:49 0.0 0 0 xntpd
root 6816242 1 60 20 1.19M 0 1.19M 1:05 0.0 0 0 rpc.lock
root 459026 0 16 41 640K 0 640K 2:19 0.0 0 0 reaffin
root 23921008 1 60 20 1.00M 0 1.00M 4:36 0.0 0 0 n4cb
lpar2rrd 23200112 25625020 64 22 868K 120K 868K 0:00 0.0 0 0 vmstat
root 7143896 1 40 41 448K 0 448K 0:48 0.0 0 0 nfsWatch
root 6160840 1 60 20 448K 0 448K 0:09 0.0 0 0 j2gt
Looks like your output file has some ASCII characters so it's better to print only those lines which starting from letters do like:
awk '/^[a-zA-Z]/' Input_file
I'm using a web host with an Apache terminal, using it to host a NodeJS application. For the most part everything runs smooth, however when I open the terminal I often get bash: fork: retry: no child processes and bash: fork: retry: resource temporarily unavailable.
I've narrowed down the cause of the problem to my .bashrc file, as when using top I could see that the many excess processes being created were bash instances:
top - 13:41:13 up 71 days, 20:57, 0 users, load average: 1.82, 1.81, 1.72
Tasks: 14 total, 1 running, 2 sleeping, 11 stopped, 0 zombie
%Cpu(s): 11.7 us, 2.7 sy, 0.1 ni, 85.5 id, 0.1 wa, 0.0 hi, 0.0 si, 0.0 st
KiB Mem : 41034544 total, 2903992 free, 6525792 used, 31604760 buff/cache
KiB Swap: 0 total, 0 free, 0 used. 28583704 avail Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
1001511 xxxxxxxx 20 0 11880 3692 1384 S 0.0 0.0 0:00.02 bash
1001578 xxxxxxxx 20 0 11880 2840 524 T 0.0 0.0 0:00.00 bash
1001598 xxxxxxxx 20 0 11880 2672 348 T 0.0 0.0 0:00.00 bash
1001599 xxxxxxxx 20 0 11880 2896 524 T 0.0 0.0 0:00.00 bash
1001600 xxxxxxxx 20 0 11880 2720 396 T 0.0 0.0 0:00.00 bash
1001607 xxxxxxxx 20 0 11880 2928 532 T 0.0 0.0 0:00.00 bash
1001613 xxxxxxxx 20 0 11880 2964 532 T 0.0 0.0 0:00.00 bash
1001618 xxxxxxxx 20 0 11880 2780 348 T 0.0 0.0 0:00.00 bash
1001619 xxxxxxxx 20 0 12012 3024 544 T 0.0 0.0 0:00.00 bash
1001620 xxxxxxxx 20 0 11880 2804 372 T 0.0 0.0 0:00.00 bash
1001651 xxxxxxxx 20 0 12012 2836 352 T 0.0 0.0 0:00.00 bash
1001653 xxxxxxxx 20 0 12016 3392 896 T 0.0 0.0 0:00.00 bash
1004463 xxxxxxxx 20 0 9904 1840 1444 S 0.0 0.0 0:00.00 bash
1005200 xxxxxxxx 20 0 56364 1928 1412 R 0.0 0.0 0:00.00 top
~/.bashrc consists of only:
# .bashrc
# Source global definitions
if [ -f /etc/bashrc ]; then
. /etc/bashrc
fi
# Uncomment the following line if you don't like systemctl's auto-paging feature:
# export SYSTEMD_PAGER=
# User specific aliases and functions
export NVM_DIR="$HOME/.nvm"
[ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh" # This loads nvm
[ -s "$NVM_DIR/bash_completion" ] && \. "$NVM_DIR/bash_completion" # This loads nvm bash_completion
If I comment out the last 3 lines like so:
#export NVM_DIR="$HOME/.nvm"
#[ -s "$NVM_DIR/nvm.sh" ] && \. "$NVM_DIR/nvm.sh" # This loads nvm
#[ -s "$NVM_DIR/bash_completion" ] && \. "$NVM_DIR/bash_completion" # This loads nvm bash_completion
Then the terminal functions as expected and no excess processes are created. However I obviously can't use nvm/npm commands while it's disabled as nvm isn't started.
I'm relatively inexperienced with bash and can't seem to figure out why this is happening. It seems that bash is somehow calling itself every time it opens, which creates the loop/fork bomb once the terminal is opened.
How can I prevent this while still being able to use nvm/npm?
Good Day,
I'm using vncsnapshot http://vncsnapshot.sourceforge.net/ in debian 7 environment to capture screenshots of workstations to monitor staffs desktop activity. This captures screenshot via nmap and saves it to my desired location accessed via internal web-page.
I have scripts like this . The x.x.x.x is the ip-range of the network to capture all open workstations.
#!/bin/bash
nmap -v -p5900 --script=vnc-screenshot-it --script-args vnc-screenshot.quality=30 x.x.x.x
And set-up in crontab to run every 5 mins.
The server has too many running processes because of it. This is the sample of ps command
root 32696 0.0 0.0 4368 0 ? S Feb23 0:00 /bin/bash /var/www/vncsnapshot/.scripts/.account.sh
root 32708 0.0 0.0 14580 4 ? S Feb23 0:00 nmap -v -p5900,5901,5902 --script=vnc-screenshot-mb
root 32717 0.0 0.0 1952 60 ? S Apr10 0:00 sh -c vncsnapshot -cursor -quality 30 x.x.x.x
root 32719 0.0 0.1 11480 4892 ? S Apr10 0:00 vncsnapshot -cursor -quality 30 30 x.x.x.x /var/w
root 32720 0.0 0.0 1952 60 ? S Apr25 0:00 sh -c vncsnapshot -cursor -quality 30 30 x.x.x.x
root 32722 0.0 0.0 1952 4 ? Ss Feb09 0:00 /bin/sh -c /var/www/vncsnapshot/.scripts/.account.sh
root 32723 0.0 0.0 3796 140 ? S Apr25 0:00 vncsnapshot -cursor -quality 30 30 x.x.x.x /var/w
root 32730 0.0 0.0 1952 4 ? Ss Feb08 0:00 /bin/sh -c /var/www/vncsnapshot/.scripts/.account
root 32734 0.0 0.0 4364 0 ? S Feb08 0:00 /bin/bash /var/www/vncsnapshot/.scripts/.account.
root 32741 0.0 0.0 13700 4 ? S Feb08 0:00 nmap -v -p5900 --script=vnc-screenshot-account --
root 32755 0.0 0.0 1952 4 ? Ss Feb08 0:00 /bin/sh -c /var/www/vncsnapshot/.scripts/.account.sh
root 32757 0.0 0.0 1952 4 ? S Feb07 0:00 sh -c vncsnapshot -cursor -quality 30 30 x.x.x.x
root 32760 0.0 0.0 3796 0 ? S Feb07 0:00 vncsnapshot -cursor -quality 30 30 x.x.x.x /var/w
root 32762 0.0 0.0 4368 0 ? S Feb09 0:00 /bin/bash /var/www/vncsnapshot/.scripts/.account.sh
root 32764 0.0 0.0 4368 0 ? S Feb08 0:00 /bin/bash /var/www/vncsnapshot/.scripts/.account.sh
How can I optimize this set-up to close un-nessesary processes that are still running.
Thanks
I split the processes in two part: nmap that regularly scan the network and the vncsnapshot that grab screenshot of a list of previously scanned host.
In my opinion, in this way the things are cleaner.
i haven't test this code
#!/bin/bash
## capture the list of host with vnc port open
list=/dev/shm/list
port=5900
network=192.168.1.*
nmap -n -p${port} --open ${network} -oG - | grep 'open\/tcp' | awk '{print $2}' > ${list}
the other script, check if a process is alive with lock file and in case launch the grab command
#!/bin/bash
list=/dev/shm/list
run=/run/vncscreenshot/
mkdir -p ${run} &>/dev/null
cat ${list} |\
while read host
do
lock="${run}/${host}.lock"
test -e ${lock} && ps -p $(<${lock}) &>/dev/null && continue
vnc-screenshot-it vnc-screenshot.quality=30 ${host} &
echo $! > ${lock}
done
I have a centos server running apache with 8GB ram. It is running very slowly to load simple php pages. I have set the following on my config file. I cannot see any httpd process more than 100m. It usually slows down after 5mins from a restart.
<IfModule prefork.c>
StartServers 12
MinSpareServers 12
MaxSpareServers 12
ServerLimit 150
MaxClients 150
MaxRequestsPerChild 1000
</IfModule>
$ ps -ylC httpd | awk '{x += $8;y += 1} END {print "Apache Memory Usage (MB): "x/1024; print "Average Proccess Size (MB): "x/((y-1)*1024)}'
Apache Memory Usage (MB): 1896.09
Average Proccess Size (MB): 36.4633
What else can I do to make the pages load faster.
$ free -m
total used free shared buffers cached
Mem: 7872 847 7024 0 29 328
-/+ buffers/cache: 489 7382
Swap: 7999 934 7065
top - 15:42:17 up 545 days, 16:46, 2 users, load average: 0.05, 0.06, 0.
Tasks: 251 total, 1 running, 250 sleeping, 0 stopped, 0 zombie
Cpu(s): 0.0%us, 2.3%sy, 0.0%ni, 97.7%id, 0.0%wa, 0.0%hi, 0.0%si, 0.
Mem: 8060928k total, 909112k used, 7151816k free, 30216k buffers
Swap: 8191992k total, 956880k used, 7235112k free, 336612k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
16544 apache 20 0 734m 47m 10m S 0.0 0.6 0:00.21 httpd
16334 apache 20 0 731m 45m 10m S 0.0 0.6 0:00.41 httpd
16212 apache 20 0 723m 37m 10m S 0.0 0.5 0:00.72 httpd
16555 apache 20 0 724m 37m 10m S 0.0 0.5 0:00.25 httpd
16347 apache 20 0 724m 36m 10m S 0.0 0.5 0:00.42 httpd
16608 apache 20 0 721m 34m 10m S 0.0 0.4 0:00.16 httpd
16088 apache 20 0 717m 31m 10m S 0.0 0.4 0:00.35 httpd
16012 apache 20 0 717m 30m 10m S 0.0 0.4 0:00.78 httpd
16338 apache 20 0 716m 30m 10m S 0.0 0.4 0:00.36 httpd
16336 apache 20 0 715m 29m 10m S 0.0 0.4 0:00.42 httpd
16560 apache 20 0 716m 29m 9.9m S 0.0 0.4 0:00.06 httpd
16346 apache 20 0 715m 28m 10m S 0.0 0.4 0:00.28 httpd
16016 apache 20 0 714m 28m 10m S 0.0 0.4 0:00.74 httpd
16497 apache 20 0 715m 28m 10m S 0.0 0.4 0:00.18 httpd
16607 apache 20 0 714m 27m 9m S 0.0 0.4 0:00.17 httpd
16007 root 20 0 597m 27m 15m S 0.0 0.3 0:00.13 httpd
16694 apache 20 0 713m 26m 10m S 0.0 0.3 0:00.10 httpd
16695 apache 20 0 712m 25m 9.9m S 0.0 0.3 0:00.04 httpd
16554 apache 20 0 712m 25m 10m S 0.0 0.3 0:00.15 httpd
16691 apache 20 0 598m 14m 2752 S 0.0 0.2 0:00.00 httpd
22613 root 20 0 884m 12m 6664 S 0.0 0.2 132:10.11 agtrep
16700 apache 20 0 597m 12m 712 S 0.0 0.2 0:00.00 httpd
16750 apache 20 0 597m 12m 712 S 0.0 0.2 0:00.00 httpd
16751 apache 20 0 597m 12m 712 S 0.0 0.2 0:00.00 httpd
2374 root 20 0 2616m 8032 1024 S 0.0 0.1 171:31.74 python
9699 root 0 -20 50304 6488 1168 S 0.0 0.1 1467:01 scopeux
9535 root 20 0 644m 6304 2700 S 0.0 0.1 21:01.24 coda
14976 root 20 0 246m 5800 2452 S 0.0 0.1 42:44.70 sssd_be
22563 root 20 0 825m 4704 2636 S 0.0 0.1 44:07.68 opcmona
22496 root 20 0 880m 4540 3304 S 0.0 0.1 13:54.78 opcmsga
22469 root 20 0 856m 4428 2804 S 0.0 0.1 1:18.45 ovconfd
22433 root 20 0 654m 4144 2752 S 0.0 0.1 10:45.71 ovbbccb
22552 root 20 0 253m 2936 1168 S 0.0 0.0 50:35.27 opcle
22521 root 20 0 152m 1820 1044 S 0.0 0.0 0:53.57 opcmsgi
14977 root 20 0 215m 1736 1020 S 0.0 0.0 15:53.13 sssd_nss
16255 root 20 0 254m 1704 1152 S 0.0 0.0 92:07.63 vmtoolsd
24180 root -51 -20 14788 1668 1080 S 0.0 0.0 9:48.57 midaemon
I do not have access to root
I have updated it to the following which seems to be better but i see occasional 7GB httpd process
<IfModule prefork.c>
StartServers 12
MinSpareServers 12
MaxSpareServers 12
ServerLimit 150
MaxClients 150
MaxRequestsPerChild 0
</IfModule>
top - 09:13:42 up 546 days, 10:18, 2 users, load average: 1.86, 1.51, 0.78
Tasks: 246 total, 2 running, 244 sleeping, 0 stopped, 0 zombie
Cpu(s): 28.6%us, 9.5%sy, 0.0%ni, 45.2%id, 16.7%wa, 0.0%hi, 0.0%si, 0.0%st
Mem: 8060928k total, 7903004k used, 157924k free, 2540k buffers
Swap: 8191992k total, 8023596k used, 168396k free, 31348k cached
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
2466 apache 20 0 14.4g 7.1g 240 R 100.0 92.1 4:58.95 httpd
2285 apache 20 0 730m 31m 7644 S 0.0 0.4 0:02.37 httpd
2524 apache 20 0 723m 23m 7488 S 0.0 0.3 0:01.75 httpd
3770 apache 20 0 716m 21m 10m S 0.0 0.3 0:00.29 httpd
3435 apache 20 0 716m 20m 9496 S 0.0 0.3 0:00.60 httpd
3715 apache 20 0 713m 19m 10m S 0.0 0.2 0:00.35 httpd
3780 apache 20 0 713m 19m 10m S 0.0 0.2 0:00.22 httpd
3778 apache 20 0 713m 19m 10m S 0.0 0.2 0:00.28 httpd
3720 apache 20 0 712m 18m 10m S 0.0 0.2 0:00.21 httpd
3767 apache 20 0 712m 18m 10m S 0.0 0.2 0:00.21 httpd
3925 apache 20 0 712m 17m 10m S 0.0 0.2 0:00.11 httpd
2727 apache 20 0 716m 17m 7576 S 0.0 0.2 0:01.66 httpd
2374 root 20 0 2680m 14m 2344 S 0.0 0.2 173:44.40 python
9699 root 0 -20 50140 5556 624 S 0.0 0.1 1475:46 scopeux
3924 apache 20 0 598m 5016 2872 S 0.0 0.1 0:00.00 httpd
3926 apache 20 0 598m 5000 2872 S 0.0 0.1 0:00.00 httpd
14976 root 20 0 246m 2400 1280 S 0.0 0.0 42:51.54 sssd_be
9535 root 20 0 644m 2392 752 S 0.0 0.0 21:07.36 coda
22563 root 20 0 825m 2000 952 S 0.0 0.0 44:16.37 opcmona
22552 root 20 0 254m 1820 868 S 0.0 0.0 50:48.12 opcle
16255 root 20 0 254m 1688 1144 S 0.0 0.0 92:53.74 vmtoolsd
22536 root 20 0 282m 1268 892 S 0.0 0.0 24:21.73 opcacta
16784 root 20 0 597m 1236 180 S 0.0 0.0 0:02.16 httpd
14977 root 20 0 215m 1092 864 S 0.0 0.0 15:57.32 sssd_nss
22496 root 20 0 880m 1076 864 S 0.0 0.0 13:57.86 opcmsga
22425 root 20 0 1834m 944 460 S 0.0 0.0 74:12.96 ovcd
22433 root 20 0 654m 896 524 S 0.0 0.0 10:48.00 ovbbccb
2634 oiadmin 20 0 15172 876 516 R 9.1 0.0 0:14.78 top
2888 root 20 0 103m 808 776 S 0.0 0.0 0:00.19 sshd
16397 root 20 0 207m 748 420 S 0.0 0.0 32:52.23 ManagementAgent
2898 oiadmin 20 0 103m 696 556 S 0.0 0.0 0:00.08 sshd
22613 root 20 0 884m 580 300 S 0.0 0.0 132:34.94 agtrep
20886 root 20 0 245m 552 332 S 0.0 0.0 79:09.05 rsyslogd
2899 oiadmin 20 0 105m 496 496 S 0.0 0.0 0:00.03 bash
24180 root -51 -20 14788 456 408 S 0.0 0.0 9:50.43 midaemon
14978 root 20 0 203m 440 308 S 0.0 0.0 9:28.87 sssd_pam
14975 root 20 0 203m 432 288 S 0.0 0.0 21:45.01 sssd
8215 root 20 0 88840 420 256 S 0.0 0.0 3:28.13 sendmail
18909 oiadmin 20 0 103m 408 256 S 0.0 0.0 0:02.83 sshd
1896 root 20 0 9140 332 232 S 0.0 0.0 50:39.87 irqbalance
2990 oiadmin 20 0 98.6m 320 276 S 0.0 0.0 0:00.04 tail
4427 root 20 0 114m 288 196 S 0.0 0.0 8:58.77 crond
25628 root 20 0 4516 280 176 S 0.0 0.0 11:15.24 ndtask
4382 ntp 20 0 28456 276 176 S 0.0 0.0 0:28.61 ntpd
8227 smmsp 20 0 78220 232 232 S 0.0 0.0 0:05.09 sendmail
25634 root 20 0 6564 200 68 S 0.0 0.0 4:50.30 mgsusageag
4926 root 20 0 110m 188 124 S 0.0 0.0 3:23.79 abrt-dump-oops
9744 root 20 0 197m 180 136 S 0.0 0.0 1:46.59 perfalarm
22469 root 20 0 856m 128 128 S 0.0 0.0 1:18.65 ovconfd
4506 rpc 20 0 19036 84 40 S 0.0 0.0 1:44.05 rpcbind
32193 root 20 0 66216 68 60 S 0.0 0.0 4:54.51 sshd
18910 oiadmin 20 0 105m 52 52 S 0.0 0.0 0:00.11 bash
22521 root 20 0 152m 44 44 S 0.0 0.0 0:53.71 opcmsgi
18903 root 20 0 103m 12 12 S 0.0 0.0 0:00.22 sshd
1 root 20 0 19356 4 4 S 0.0 0.0 3:57.84 init
1731 root 20 0 105m 4 4 S 0.0 0.0 0:01.91 rhsmcertd
1983 dbus 20 0 97304 4 4 S 0.0 0.0 0:16.92 dbus-daemon
2225 root 20 0 4056 4 4 S 0.0 0.0 0:00.01 mingetty
Your server is slow because you are condeming it to a non-threaded, ever-reclaiming childs scenario.
That is you use more than 12 processes but your maxspareservers is 12 so HTTPD is constantly spawning and despawning processes and precisely that's the biggest weakness of a non-threaded mpm. And also such a low MaxRequestsPerChild won't help either if you have a decent amount of requests per second, although understable since you are using mod_php, that value will increase the constant re-spawning.
In any OS, spawning processes uses much more cpu than spawning threads inside a process.
So either you set MaxSpareServers to a very high number so your server have lots of them ready to serve your requests, or you STOP using mod_php+prefork and probably .htaccess (like everyone in here who seems to believe that's needed for apache httpd to work). to a more reliable: HTTPD with mpm_event + mod_proxy_fcgi + php-fpm, where you can configure dozens of hundreds of threads and apache will spawn and use them in less than a blink and you leave all your php load under php's own daemon, php-fpm.
So, it's not apache, it is your ever-respawning processes setup in a non-threaded mpm what's giving you troubles.
My question is very similar to that posted in: How do I put an already-running process under nohup?
Say I execute foo.sh from my command line, and it in turn executes another shell script, and so on. For example:
foo.sh
\_ bar.sh
\_ baz.sh
Now I press Ctrl+Z to suspend "foo.sh". It is listed in my "jobs -l".
How do I disown baz.sh so that it is no longer a grandchild of foo.sh? If I type "disown" then only foo.sh is disowned from its parent, which isn't exactly what i want. I'd like to kill off the foo.sh and bar.sh processes and only be left with baz.sh.
My current workaround is to "kill -18" (resume) baz.sh and go on with my work, but I would prefer to kill the aforementioned processes. Thanks.
Use ps to get the PID of bar.sh, and kill it.
imac:barmar $ ps -l -t p0 -ww
UID PID PPID F CPU PRI NI SZ RSS WCHAN S ADDR TTY TIME CMD
501 3041 3037 4006 0 31 0 2435548 760 - Ss 8c6da80 ttyp0 0:00.74 /bin/bash --noediting -i
501 68228 3041 4006 0 31 0 2435544 664 - S 7cbc2a0 ttyp0 0:00.00 /bin/bash ./foo.sh
501 68231 68228 4006 0 31 0 2435544 660 - S c135a80 ttyp0 0:00.00 /bin/bash ./bar.sh
501 68232 68231 4006 0 31 0 2435544 660 - S a64b7e0 ttyp0 0:00.00 /bin/bash ./baz.sh
501 68233 68232 4006 0 31 0 2426644 312 - S f9a1540 ttyp0 0:00.00 sleep 100
0 68243 3041 4106 0 31 0 2434868 480 - R+ a20ad20 ttyp0 0:00.00 ps -l -t p0 -ww
imac:barmar $ kill 68231
./foo.sh: line 3: 68231 Terminated ./bar.sh
[1]+ Exit 143 ./foo.sh
imac:barmar $ ps -l -t p0 -ww
UID PID PPID F CPU PRI NI SZ RSS WCHAN S ADDR TTY TIME CMD
501 3041 3037 4006 0 31 0 2435548 760 - Ss 8c6da80 ttyp0 0:00.74 /bin/bash --noediting -i
501 68232 1 4006 0 31 0 2435544 660 - S a64b7e0 ttyp0 0:00.00 /bin/bash ./baz.sh
501 68233 68232 4006 0 31 0 2426644 312 - S f9a1540 ttyp0 0:00.00 sleep 100
0 68248 3041 4106 0 31 0 2434868 480 - R+ 82782a0 ttyp0 0:00.00 ps -l -t p0 -ww