Bug #76867 [Opn]: Extremely slow performance

Edit report at https://bugs.php.net/bug.php?id=76867&edit=1 ID: 76867 User updated by: ivokund at gmail dot com Reported by: ivokund at gmail dot com Summary: Extremely slow performance Status: Open Type: Bug Package: Performance problem Operating System: Ubuntu 18.04.1 LTS PHP Version: 7.2.9 Block user comment: N Private report: N New Comment: I disabled huge pages with "hugeadm --thp-never" and the problem disappeared instantly. I'm happy now, so if this is not a PHP issue then please close the issue. Thanks for your help everyone! Previous Comments: ------------------------------------------------------------------------ [2018-09-13 15:17:58] requinix@php.net I don't believe USE_ZEND_ALLOC_HUGE_PAGES will control PHP's use of madvise. Try disabling transparent huge pages in your kernel. ------------------------------------------------------------------------ [2018-09-13 15:02:49] ivokund at gmail dot com Ok, got some new information. This is the first time I hear about huge pages, so pretty sure, I haven't configured anything on purpose. Setting USE_ZEND_ALLOC_HUGE_PAGES=0 in environment does not seem to have any effect. _______________ $ export USE_ZEND_ALLOC_HUGE_PAGES=0 $ echo $USE_ZEND_ALLOC_HUGE_PAGES 0 $ time php -n --version PHP 7.2.9-1+ubuntu18.04.1+deb.sury.org+1 (cli) (built: Aug 19 2018 07:16:54) ( NTS ) Copyright (c) 1997-2018 The PHP Group Zend Engine v3.2.0, Copyright (c) 1998-2018 Zend Technologies real 0m10,453s user 0m0,049s sys 0m0,024s _______________ Here is a complete output from "strace php -n --version" with USE_ZEND_ALLOC_HUGE_PAGES=0 https://pastebin.com/raw/Cnmvarqd Any further ideas would be greatly appreciated! ------------------------------------------------------------------------ [2018-09-13 06:22:27] ivokund at gmail dot com The manifestation of this problem apparently also varies daily, as I'm having trouble reproducing it today (although, there have been no reboots). I'll continue debugging as soon as the problem returns and will get back to you. Thanks for your help so far! ------------------------------------------------------------------------ [2018-09-12 13:33:26] sjon at hortensius dot net Huge pages should be disabled by default, see also #70984 Did you or your distro enable it? Can you try with USE_ZEND_ALLOC_HUGE_PAGES=0 ------------------------------------------------------------------------ [2018-09-12 08:40:46] ivokund at gmail dot com Ok, strace seems to tell me that process seems to hang at: madvise(0x7f70efe00000, 2097152, MADV_HUGEPAGE) = 0 Any ideas? Thanks! ------------------------------------------------------------------------ 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=76867 -- Edit this bug report at https://bugs.php.net/bug.php?id=76867&edit=1