php flush() are not effective.

[Shri @ DevLib.Org]

Ken - The PHP directive / PHP.INI setting is of no use, as the webserver is compressing and buffering the output.

You might want to consider turning the gzip on and off depending on the location. According to http://wiki.nginx.org/NginxHttpGzipModule gzip on | off is supported down to a location level.

Did you need to change the fastcgi_buffer_size variable? Best to change one variable at a time and figure what causes / fixes the problem (and change back to see if the old symptoms reappear).

Regards,
Shri

  ----- Original Message ----- 
  From: Ken Chen 
  To: nginx at sysoev.ru 
  Sent: Thursday, April 30, 2009 2:03 AM
  Subject: Re: php flush() are not effective.


  hi Shri,

  Thanks a lot! It works.

  I change the nginx configuration to:

  fastcgi_buffer_size 4k;
  gzip  off;

  And PHP script:

  <?php

  ob_flush();
  echo The first line<br />";
  flush();
  sleep(2);

  for ($i=10; $i>0; $i--)
  {
      echo $i . "<br />";
      echo str_repeat(" ",4096);
      ob_flush();
      flush();
      sleep(1);
  }
  ob_end_flush();
  ?>

  But how do you implement them to the productive server? 

  Set 'zlib.output_compression = On' in php.ini, and only compress static content in nginx.conf ?


  Regards,
  Ken


  2009/4/29 Shri @ DevLib.Org <shri at devlib.org>

    I've noticed this too. Can you retry after turning gzip off? Worked in my case. 

    We have some scripts which run for 20-30 mins, rebuilding some large databases and they need to be run isolated from the main webserver which has gzip on.

    Regards,
    Shri

      ----- Original Message ----- 
      From: Ken Chen 
      To: nginx at sysoev.ru 
      Sent: Wednesday, April 29, 2009 11:20 PM
      Subject: php flush() are not effective.


      Hi all,

      I am trying to flush content before the end of PHP script. With below script, it works under lighttpd, but not work after changing to nginx. 

      <?php

      ob_flush();
      echo "The first line<br />";
      flush();
      sleep(2);

      for ($i=10; $i>0; $i--)
      {
          echo $i . "<br />";
      #    echo str_repeat(" ",8192);
          ob_flush();
          flush();
          sleep(1);
      }
      ob_end_flush();
      ?>


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