最後更新: 2024-04-18

The details given are:

 * The number of workers serving requests
 * The number of idle workers

Centos6: apache 2.4

/etc/httpd/conf/httpd.conf

# port for munin monitor
Listen 8089

LoadModule status_module modules/mod_status.so

Remark

It should be noted that if mod_status is loaded into the server, its handler capability is available in all configuration files,

including per-directory files (e.g., .htaccess).

vhosts.conf

# vhost for munin monitor
<VirtualHost *:8089>
  DocumentRoot /var/www/html/
  ServerName 8089
  ErrorLog "/dev/null"
  CustomLog "/dev/null" common
  <Directory /var/www/html/>
     Options -Indexes
     AllowOverride None
     Require all denied
  </Directory>
  # Set server status handler
  <Location /server-status>
    SetHandler server-status
    Require all denied
    Require ip 127.0.0.1
  </Location>
</VirtualHost>

# Test ACL

curl -I http://127.0.0.1:8089

curl -I http://127.0.0.1:8089/server-status

Standard output

Part 1

Apache Server Status for localhost (via 127.0.0.1)

Server Version: Apache/2.4.33 (IUS) OpenSSL/1.0.1e-fips

Server MPM: prefork

Server Built: Apr 18 2018 10:39:22

Part 2

Current Time: Tuesday, 13-Nov-2018 15:14:51 HKT
Restart Time: Tuesday, 13-Nov-2018 13:23:07 HKT    # reload 時會與 uptime 一起更新
Parent Server Config. Generation: 1                # Generation 會每次 reload 後加 1
Parent Server MPM Generation: 0                
Server uptime: 1 hour 51 minutes 43 seconds        # Apache 的 uptime (不是 Server 的 uptime)
Server load: 0.00 0.00 0.00
Total accesses: 1847 - Total Traffic: 26.1 MB
CPU Usage: u31.33 s18 cu0 cs0 - .736% CPU load
.276 requests/sec - 4077 B/second - 14.5 kB/request
1 requests currently being processed, 16 idle workers

Part 3

KK__________...W...KKKKKK____...................................   <- 一行有 64 格
................................................................

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

格數

00-mpm.conf

<IfModule mpm_prefork_module>
    StartServers                10
    MinSpareServers             10
    MaxSpareServers             20
    MaxRequestWorkers           250
    ServerLimit                 500
    MaxConnectionsPerChild      4000
</IfModule>

ExtendedStatus

Settings

ExtendedStatus On

You can see the full request and client information for each child or thread.

This setting applies to the entire server and

cannot be enabled or disabled on a virtualhost-by-virtualhost basis.

The collection of extended status information can slow down the server.

Also note that this setting cannot be changed during a graceful restart.

會多了以下 Info(ExtendedStatus On):

Srv    PID    Acc     M    CPU     SS    Req    Conn    Child   Slot    Client    VHost    Request
0-0    13696  4/4/4   K    0.03    1     26     0.6     0.00    0.00    SRC_IP    vhost1   POST /path/update.php HTTP/1.1
2-0    13698  0/2/2   _    0.00    0     0      0.0     0.01    0.01    SRC_IP    vhost2   GET /server-status HTTP/1.1

原本(ExtendedStatus Off):

PID Key:
   11321 in state: _ ,   11321 in state: _ ,   11321 in state: _
   ...
   11322 in state: _ ,   11322 in state: _ ,   11322 in state: _
   ...

Auto Refresh

http://URL/server-status/status?refresh=2

Machine-readable format

http://URL/server-status/status?auto

...
CurrentTime: Thursday, 18-Apr-2024 14:59:29 HKT
RestartTime: Thursday, 18-Apr-2024 14:45:13 HKT
ParentServerConfigGeneration: 1                # "service httpd reload" 時會增加
ParentServerMPMGeneration: 0
ServerUptimeSeconds: 855
...
ReqPerSec: .292321
BytesPerSec: 4079.02
...
IdleWorkers: 74
Processes: 3
...
ConnsTotal: 1