Bug #73807 [Ana]: Performance problem with processing post request over 2000000 chars

Edit report at https://bugs.php.net/bug.php?id=73807&edit=1 ID: 73807 Updated by: nikic@php.net Reported by: pparadowski at media4u dot pl Summary: Performance problem with processing post request over 2000000 chars Status: Analyzed Type: Bug Package: Performance problem Operating System: FreeBSD 9.4-11.0 PHP Version: 5.6.29, 7.0,7.1 Block user comment: N Private report: N New Comment: Another cause might be FreeBSD's *extremely* slow realloc() implementation. I remember this causing performance issues in other places. Previous Comments: ------------------------------------------------------------------------ [2017-01-31 07:12:09] rasmus@php.net Ok, so it isn't accf_http doing it. It still feels like something along those lines. Like a socket buffer being too small and the resulting context switching causing it to slow down. Perhaps try playing around with pmcstat or dtrace and see if you can get a picture of what one of these slow requests is doing compared to a smaller fast one. ------------------------------------------------------------------------ [2017-01-31 07:00:22] pparadowski at media4u dot pl While testing accf_http module is disabled ------------------------------------------------------------------------ [2017-01-31 06:53:18] pparadowski at media4u dot pl my /boot/loader.conf is empty. In defaults loader.conf I've got accf_data_load="NO" accf_nds_load="NO" accf_http_load="NO" ------------------------------------------------------------------------ [2017-01-30 18:20:44] rasmus@php.net This sounds like an interesting bug. Since it happens on FreeBSD and not on Linux it might be related to FreeBSD's accf_http "httpready" feature which buffers incoming HTTP requests before triggering the accept. Could you have a look at your /boot/loader.conf file and try disabling accf_http_load if it is enabled there and see if that makes a difference? Note that it triggers a kernel module to be loaded, so you will need to reboot, or manually "kldunload accf_http" ------------------------------------------------------------------------ [2017-01-30 10:58:59] pparadowski at media4u dot pl same problem on php 7.1. ------------------------------------------------------------------------ The remainder of the comments for this report are too long. To view the rest of the comments, please view the bug report online at https://bugs.php.net/bug.php?id=73807 -- Edit this bug report at https://bugs.php.net/bug.php?id=73807&edit=1