performance - How to track down slow code in PHP -

-

i installed open source php project on ubuntu server , got running. however, pages load extremely slow. phpinfo() page , basic test page connecting mysql db load fast. there tons of include files, log files , curl calls in open source code. strategies/tools can use track down source of slowness?

you need profile pages, have performance problems. can done php-extension xdebug , kcachegrind.

follow steps:

  1. install php5-xdebug package on ubuntu server via: sudo apt-get install php5-xdebug.
  2. configure xdebug.profiler_enable_trigger parameter. @ official manual.
  3. install on local computer kcachegrind package: sudo apt-get install kcachegrind.
  4. start slow page get parameter xdebug_profile=1. see related question.
  5. copy generated profile log local comp , open in kcachegrind.

some notes:

  • after php5-xdebug package installation you'll need restart http-server (or php-fpm daemon. depends on installed software on server).
  • right place profiling procedure test environment, not production.

Comments

Post a Comment

Popular posts from this blog

c# - How to get the current UAC mode -

-
can check current uac type set in device before running application through c#. i got know approach check whether current user administrator or not. but, need know uac type set (i.e. default/never notify) internal logic. is possible? please help. this article self-elevation , checking level program runs in. due security reasons i'm afraid won't able retrieve uac level set. http://code.msdn.microsoft.com/windowsdesktop/csuacselfelevation-644673d3
Read more

postgresql - Lazarus + Postgres: incomplete startup packet -

-
i've been building lazarus pascal program using postgresql on back-end. used work fine following lines opening db. dbconn:= tpqconnection.create(nil); dbconn.hostname := 'localhost'; dbconn.databasename:= 'dbhrs'; dbconn.username:='mizk'; dbconn.password:='123'; dbconn.open; if dbconn.connected openhrsdb := true else openhrsdb := false; but moment change localhost server's ip (on lan), program stops. no errors or warnings. have no clue happening. here related details may narrow down problem. the program i'm running workstation on same lan server. both machines run ubuntu 12.04 desktop i can access postgres db on server using pgadmin iii, guess it's not firewall issue. i have allowed postgresql ufw , ufw disabled. strangely, when firewall disabled, can ssh server terminal using workstation. when it's enabled, can't my biggest concern right why pascal program not working when i...
Read more

javascript - Ajax jqXHR.status==0 fix error -

-
$.ajax({ url: urlstring, datatype: "json", type: "get", success: function (data) { alert(data); }, error: function (jqxhr, exception) { if (jqxhr.status === 0) { alert('not connect.\n verify network.'); } else if (jqxhr.status == 404) { alert('requested page not found. [404]'); } else if (jqxhr.status == 500) { alert('internal server error [500].'); } else if (exception === 'parsererror') { alert('requested json parse failed.'); } else if (exception === 'timeout') { alert('time out error.'); } else if (exception === 'abort') { alert('ajax request aborted.'); } else { alert('uncaught error.\n' + jqxhr.responsete...
Read more