Monitoring traffic rate on Apache Web (httpd)
One of the main issues when working on performance is to implant different monitors all along your application data flow.
I've used HitCounter (legacy liveperson code), Jamon (thanks to Dmitry Voronov) and yammer metrics (thanks to Michael Rushanik) within my tomcat REST application (detailed Post with my conclusions will come soon, hopefully)
But
if you want also to check your apache web server and obtain the traffic
rate it currently handle or the current number of opened connections,
this post is for you ...
First of all, the status is ugly , not really graphic but it exists . It looks like that (the bold emphasize is mine)
http://tlvvp1/server-status (you can also use http://tlvvp1/server-status?auto)
In order to have this server-status, do the following:
in your file /etc/httpd/conf/httpd.conf within your apache web server, make sure the following line is uncommented:
Then, in create the following file /etc/httpd/conf.d/status.conf
In addition, you can also use the balancer-manager, which shows how the load balancing is handled (how many nodes in your proxy, what is the factor of each of them etc ...)
So in your applicative conf.d/your-cluster-definition.conf
Then, restart your web server
Once your apache is up and running, you can access the server-status using this URL
I've used HitCounter (legacy liveperson code), Jamon (thanks to Dmitry Voronov) and yammer metrics (thanks to Michael Rushanik) within my tomcat REST application (detailed Post with my conclusions will come soon, hopefully)
http://tlvvp1/server-status (you can also use http://tlvvp1/server-status?auto)
Apache Server Status for tlvvp1
Server Version: Apache/2.2.15 (Unix)
Server Built: Feb 13 2012 22:31:42
Current Time: Tuesday, 12-Mar-2013 10:29:54 EDT
Restart Time: Tuesday, 12-Mar-2013 10:25:10 EDT
Parent Server Generation: 0
Server uptime: 4 minutes 43 seconds
Total accesses: 1248792 - Total Traffic: 2.9 GB
CPU Usage: u122.3 s123.1 cu0 cs0 - 86.7% CPU load
4410 requests/sec - 10.5 MB/second - 2503 B/request
202 requests currently being processed, 15 idle workers
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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
0-0 4399 173/6605/6605 K 1.25 0 4 422.9 15.77 15.77 192.168.13.8 vipr-CI.tlv.lpnet.com GET /account/site1/visitorProfiles?visitorID=user1&visitor-gene
1-0 4400 162/6594/6594 K 1.16 0 1 396.0 15.74 15.74 192.168.13.8 vipr-CI.tlv.lpnet.com GET /account/site1/visitorProfiles?visitorID=user1&visitor-gene
2-0 4401 139/6571/6571 K 1.41 0 4 339.8 15.69 15.69 192.168.13.8 vipr-CI.tlv.lpnet.com GET /account/site1/visitorProfiles?visitorID=user1&visitor-gene
3-0 4402 131/6563/6563 K 1.25 0 3 320.2 15.67 15.67 192.168.13.8 vipr-CI.tlv.lpnet.com GET /account/site1/visitorProfiles?visitorID=user1&visitor-gene
4-0 4403 175/6607/6607 K 1.26 0 2 427.8 15.77 15.77 192.168.13.8 vipr-CI.tlv.lpnet.com GET /account/site1/visitorProfiles?visitorID=user1&visitor-gene
5-0 4404 153/6585/6585 K 1.28 0 4 374.0 15.72 15.72 192.168.13.8 vipr-CI.tlv.lpnet.com GET /account/site1/visitorProfiles?visitorID=user1&visitor-gene
6-0 4405 131/6563/6563 K 1.39 0 3 320.2 15.67 15.67 192.168.13.8 vipr-CI.tlv.lpnet.com GET /account/site1/visitorProfiles?visitorID=user1&visitor-gene
7-0 4406 155/6587/6587 K 1.29 0 4 378.9 15.72 15.72 192.168.13.8 vipr-CI.tlv.lpnet.com GET /account/site1/visitorProfiles?visitorID=user1&visitor-gene
8-0 4407 155/6587/6587 K 1.24 0 1 378.9 15.72 15.72 192.168.13.8 vipr-CI.tlv.lpnet.com GET /account/site1/visitorProfiles?visitorID=user1&visitor-gene
9-0 4408 125/6757/6757 K 1.27 0 3 305.5 16.13 16.13 192.168.13.8 vipr-CI.tlv.lpnet.com GET /account/site1/visitorProfiles?visitorID=user1&visitor-gene
10-0 4409 147/6579/6579 K 1.28 0 4 359.3 15.70 15.70 192.168.13.8 vipr-CI.tlv.lpnet.com GET /account/site1/visitorProfiles?visitorID=user1&visitor-gene
11-0 4410 120/6151/6151 K 1.26 0 4 293.3 14.75 14.75 192.168.13.8 vipr-CI.tlv.lpnet.com GET /account/site1/visitorProfiles?visitorID=user1&visitor-gene
12-0 - 0/0/1207 . 0.30 262 0 0.0 0.00 2.88 ::1 vipr-CI.tlv.lpnet.com OPTIONS * HTTP/1.0
13-0 4412 153/6585/6585 K 1.31 0 1 374.0 15.72 15.72 192.168.13.8 vipr-CI.tlv.lpnet.com GET /account/site1/visitorProfiles?visitorID=user1&visitor-gene
14-0 4413 136/6568/6568 K 1.25 0 2 332.4 15.68 15.68 192.168.13.8 vipr-CI.tlv.lpnet.com GET /account/site1/visitorProfiles?visitorID=user1&visitor-gene
15-0 4414 145/6578/6578 K 1.28 0 3 354.4 15.70 15.70 192.168.13.8 vipr-CI.tlv.lpnet.com GET /account/site1/visitorProfiles?visitorID=user1&visitor-gene
16-0 4415 138/6570/6570 K 1.27 0 1 337.3 15.68 15.68 192.168.13.8 vipr-CI.tlv.lpnet.com GET /account/site1/visitorProfiles?visitorID=user1&visitor-gene
17-0 4416 143/6575/6575 K 1.35 0 4 349.5 15.69 15.69 192.168.13.8 vipr-CI.tlv.lpnet.com GET /account/site1/visitorProfiles?visitorID=user1&visitor-gene
18-0 4417 148/6580/6580 K 1.32 0 3 361.8 15.71 15.71 192.168.13.8 vipr-CI.tlv.lpnet.com GET /account/site1/visitorProfiles?visitorID=user1&visitor-gene
19-0 4418 163/6595/6595 W 1.31 0 0 398.4 15.74 15.74 192.168.13.8 vipr-CI.tlv.lpnet.com GET /account/site1/visitorProfiles?visitorID=user1&visitor-gene
20-0 4419 186/6417/6417 K 1.18 0 2 454.6 15.32 15.32 192.168.13.8 vipr-CI.tlv.lpnet.com GET /account/site1/visitorProfiles?visitorID=user1&visitor-gene
21-0 4420 187/6217/6217 K 1.23 0 3 457.1 14.84 14.84 192.168.13.8 vipr-CI.tlv.lpnet.com GET /account/site1/visitorProfiles?visitorID=user1&visitor-gene
22-0 4421 183/6213/6213 K 1.23 0 2 447.3 14.83 14.83 192.168.13.8 vipr-CI.tlv.lpnet.com GET /account/site1/visitorProfiles?visitorID=user1&visitor-gene
23-0 4422 0/6030/6030 _ 1.22 0 3 0.0 14.39 14.39 192.168.13.8 vipr-CI.tlv.lpnet.com GET /account/site1/visitorProfiles?visitorID=user1&visitor-gene
LoadModule status_module modules/mod_status.so
ExtendedStatus On
<Location /server-status>
SetHandler server-status
Order Allow,Deny
Allow from all
</Location>
In addition, you can also use the balancer-manager, which shows how the load balancing is handled (how many nodes in your proxy, what is the factor of each of them etc ...)
So in your applicative conf.d/your-cluster-definition.conf
You can then visualize it using http://tlvvp1:80/balancer-manager/ (use the right port, if customized) and you'll see something like:<Location /balancer-manager>SetHandler balancer-managerOrder Allow,DenyAllow from all</Location>
Load Balancer Manager for tlvvp1
Server Version: Apache/2.4.3 (Unix)
Server Built: Dec 26 2012 10:54:47
LoadBalancer Status for balancer://vipr-ci
MaxMembers StickySession DisableFailover Timeout FailoverAttempts Method Path Active 3 [3 Used] (None) Off 0 2 bybusyness /account Yes
Worker URL Route RouteRedir Factor Set Status Elected Busy Load To From ajp://tlvvpcas3.tlv.lpnet.com:8009 1 0 Init Ok 0 0 0 0 0 ajp://tlvvpcas4.tlv.lpnet.com:8009 1 0 Init Ok 0 0 0 0 0 ajp://tlvvpcas2.tlv.lpnet.com:8009 1 0 Init Ok 0 0 0 0 0
service LPApache restart [or whatever your service is called ]
http://tlvvp1/server-status(replace the host name [tlvvp1] by your own one)
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