Apache High CPU Usage Enable Mod_Status Guide Solution - Find Cause of High CPU Usage Script/Domain

mod_status is a great way to track down the source of high CPU usage and to find what vhost/script is the cause of it.

It gives you a live view of bandwith usage, CPU usage, and memory usage broken down by domain/vhost and script/URI.

Enable mod_status

vi /etc/httpd/conf/httpd.conf

ExtendedStatus On

<Location /server-status>
SetHandler server-status

Order Deny,Allow
Deny from all
Allow from 127.0.0.1
</Location>

Add your IP after 127.0.0.1.  I believe you could also require an htaccess pasword if you want.

After that reload Apache and browse to your webserver to http://yourhost.com/server-status and you'll see something like below:


Apache Server Status for localhost

Server Version: Apache/2.2.3 (CentOS)
Server Built: Aug 30 2010 12:32:08

Current Time: Saturday, 30-Apr-2011 15:55:46 PDT

Restart Time: Thursday, 28-Apr-2011 23:03:58 PDT
Parent Server Generation: 3
Server uptime: 1 day 16 hours 51 minutes 48 seconds
Total accesses: 243995 - Total Traffic: 1.7 GB
CPU Usage: u18.36 s1.75 cu2.88 cs0 - .0156% CPU load
1.66 requests/sec - 12.1 kB/second - 7.3 kB/request
1 requests currently being processed, 3 idle workers
W_..__....

Scoreboard Key:
"_" Waiting for Connection, "S" Starting up, "R" Reading Request,
"W" Sending Reply, "K" Keepalive (read), "D" DNS Lookup,
"C" Closing connection, "L" Logging, "G" Gracefully finishing,
"I" Idle cleanup of worker, "." Open slot with no current process

Srv PID Acc M CPU SS Req Conn Child Slot Client VHost Request
0-3 22481 0/29/36628 W 0.42 0 0 0.0 0.04 307.98 9 testdomain.com GET /server-status?refresh=10 HTTP/1.1
1-3 18115 0/271/37239 _ 6.33 4 236 0.0 1.20 255.47   forums.testdomain.com POST /mgc_cb_evo_ajax.php HTTP/1.1
2-3 - 0/0/35305 . 0.61 54 0 0.0 0.00 235.80   forums.testdomain.com GET /forumdisplay.php?s=e5pr
3-3 - 0/0/34526 . 9.19 69 0 0.0 0.00 235.66 ::1 00-defaultsite.com OPTIONS * HTTP/1.0
4-3 22258 0/49/28952 _ 1.12 4 0 0.0 0.21 194.55   forums.testdomain.com GET /cpstyles/kartel/kartel/misc/down9x9.gif HTTP/1.1
5-3 19843 0/232/27942 _ 3.10 1 137 0.0 0.77 181.58   unitetest.com GET //index.php?action=profile;u=174 HTTP/1.1
6-3 - 0/0/19301 . 2.31 569 0 0.0 0.00 130.28 ::1 00-defaultsite.com OPTIONS * HTTP/1.0
7-3 - 0/0/16325 . 0.26 2102 0 0.0 0.00 141.16 ::1 00-defaultsite.com OPTIONS * HTTP/1.0
8-3 - 0/0/5534 . 0.01 2103 0 0.0 0.00 36.51 ::1 00-defaultsite.com OPTIONS * HTTP/1.0
9-3 - 0/0/2243 . 0.09 2100 0 0.0 0.00 15.39 ::1 00-defaultsite.com OPTIONS * HTTP/1.0


Srv Child Server number - generation
PID OS process ID
Acc Number of accesses this connection / this child / this slot
M Mode of operation
CPU CPU usage, number of seconds
SS Seconds since beginning of most recent request
Req Milliseconds required to process most recent request
Conn Kilobytes transferred this connection
Child Megabytes transferred this child
Slot Total megabytes transferred this slot

SSL/TLS Session Cache Status:
cache type: SHMCB, shared memory: 512000 bytes, current sessions: 3
sub-caches: 32, indexes per sub-cache: 133
time left on oldest entries' SSL sessions: avg: 6 seconds, (range: 6...7)
index usage: 0%, cache usage: 0%
total sessions stored since starting: 571
total sessions expired since starting: 568
total (pre-expiry) sessions scrolled out of the cache: 0
total retrieves since starting: 15093 hit, 512 miss
total removes since starting: 0 hit, 0 miss

Tags:

apache, cpu, usage, enable, mod_status, domainmod_status, vhost, bandwith, domain, uri, vi, etc, httpd, conf, extendedstatus, server, sethandler, ip, htaccess, pasword, reload, browse, webserver, http, yourhost, ll, localhost, centos, aug, apr, pdt, restart, pdtparent, uptime, secondstotal, accesses, gbcpu, cu, cs, requests, kb, currently, processed, idle, workers, w_, __, scoreboard, quot, _, reply, keepalive, dns, lookup, logging, gracefully, finishing, cleanup, slot, srv, pid, acc, ss, req, conn, testdomain, refresh, forums, mgc_cb_evo_ajax, php, forumdisplay, pr, defaultsite, cpstyles, kartel, misc, gif, unitetest, index, os, mode, milliseconds, kilobytes, megabytes, ssl, tls, cache, shmcb, bytes, sessions, caches, indexes, entries, avg, stored, expired, expiry, scrolled, retrieves, removes,

Latest Articles

  • How to resize a pdf without losing much quality in Linux Mint Ubuntu Debian Redhat Solution
  • qemu: could not load PC BIOS 'bios-256k.bin' solution
  • Proxmox How To Custom Partition During Install
  • Hyper-V Linux VM Boots to Black Screen, Storage, NIC Not Found Issues
  • Ubuntu Mint How to Fix Missing/Broken /dev and /dev/pts which causes terminal to immediately close exit and not work
  • How high can a Xeon CPU get?
  • bash fix PATH environment variable "command not found" solution
  • Ubuntu Linux Mint Debian Redhat Youtube Cannot Play HD or 4K videos, dropped frames or high CPU usage with Nvidia or AMD Driver
  • hostapd example configuration for high speed AC on 5GHz using WPA2
  • hostapd how to enable and use WPS to connect wireless devices like printers
  • Dell Server Workstation iDRAC Dead after Firmware Update Solution R720, R320, R730
  • Cloned VM/Server/Computer in Linux won't boot and goes to initramfs busybox Solution
  • How To Add Windows 7 8 10 11 to GRUB Boot List Dual Booting
  • How to configure OpenDKIM on Linux with Postfix and setup bind zonefile
  • Debian Ubuntu 10/11/12 Linux how to get tftpd-hpa server setup tutorial
  • efibootmgr: option requires an argument -- 'd' efibootmgr version 15 grub-install.real: error: efibootmgr failed to register the boot entry: Operation not permitted.
  • Apache Error Won't start SSL Cert Issue Solution Unable to configure verify locations for client authentication SSL Library Error: 151441510 error:0906D066:PEM routines:PEM_read_bio:bad end line SSL Library Error: 185090057 error:0B084009:x509 certif
  • Linux Debian Mint Ubuntu Bridge br0 gets random IP
  • redis requirements
  • How to kill a docker swarm