Bug #76867 [Opn->Fbk]: Extremely slow performance

Edit report at https://bugs.php.net/bug.php?id=76867&edit=1 ID: 76867 Updated by: requinix@php.net Reported by: ivokund at gmail dot com Summary: Extremely slow performance -Status: Open +Status: Feedback 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: My go-to tool is strace. Tee the (preferably timestamp-prefixed) output to a log you can review, but when it's running you can watch the output go past and it should be obvious when it stalls. Previous Comments: ------------------------------------------------------------------------ [2018-09-12 08:38:46] spam2 at rhsoft dot net [root@rh:~]$ strace php -v execve("/usr/bin/php", ["php", "-v"], 0x7ffd1f12fe58 /* 32 vars */) = 0 brk(NULL) = 0x55ef8e731000 brk(0x55ef8e731026) = 0x55ef8e731026 brk(NULL) = 0x55ef8e731026 access("/etc/ld.so.preload", R_OK) = -1 ENOENT (Datei oder Verzeichnis nicht gefunden) openat(AT_FDCWD, "/etc/ld.so.cache", O_RDONLY|O_CLOEXEC) = 3 fstat(3, {st_mode=S_IFREG|0644, st_size=111591, ...}) = 0 mmap(NULL, 111591, PROT_READ, MAP_PRIVATE, 3, 0) = 0x7f89b25eb000 close(3) = 0 openat(AT_FDCWD, "/lib64/libpthread.so.0", O_RDONLY|O_CLOEXEC) = 3 read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0Pb\0\0\0\0\0\0"..., 832) = 832 fstat(3, {st_mode=S_IFREG|0755, st_size=154128, ...}) = 0 mmap(NULL, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, -1, 0) = 0x7f89b25e9000 mmap(NULL, 2221184, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f89b21c2000 mprotect(0x7f89b21db000, 2097152, PROT_NONE) = 0 mmap(0x7f89b23db000, 8192, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_DENYWRITE, 3, 0x19000) = 0x7f89b23db000 mmap(0x7f89b23dd000, 13440, PROT_READ|PROT_WRITE, MAP_PRIVATE|MAP_FIXED|MAP_ANONYMOUS, -1, 0) = 0x7f89b23dd000 close(3) = 0 openat(AT_FDCWD, "/lib64/libresolv.so.2", O_RDONLY|O_CLOEXEC) = 3 read(3, "\177ELF\2\1\1\0\0\0\0\0\0\0\0\0\3\0>\0\1\0\0\0@8\0\0\0\0\0\0"..., 832) = 832 fstat(3, {st_mode=S_IFREG|0755, st_size=98144, ...}) = 0 mmap(NULL, 2189952, PROT_READ|PROT_EXEC, MAP_PRIVATE|MAP_DENYWRITE, 3, 0) = 0x7f89b1fab000 mprotect(0x7f89b1fbe000, 2097152, PROT_NONE) = 0 ................ ------------------------------------------------------------------------ [2018-09-12 08:36:29] ivokund at gmail dot com Sure! Any ideas on what to look for or what approach to use are welcome! I'll do some more investigation. ------------------------------------------------------------------------ [2018-09-12 08:29:49] requinix@php.net Simply saying it's slow doesn't help us identify the problem, let alone fix it. If you can reproduce it on the command line then it shouldn't be hard to trace the process to see where the time is being spent. ------------------------------------------------------------------------ [2018-09-12 08:24:26] spam2 at rhsoft dot net very unlikely a php problem look at your system load and check if the machine runs out of random (google for haveged) ------------------------------------------------------------------------ [2018-09-12 08:11:51] ivokund at gmail dot com Description: ------------ Both CLI and web requests are extremely slow. The smallest isolated example I can think of is below. The slow time varies apparently by random. Test script: --------------- No problem here: ___________________________ 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 0m0,009s user 0m0,004s sys 0m0,004s Second try half a second later takes 8 sec ____________________________ 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 0m8,440s user 0m0,001s sys 0m0,264s ------------------------------------------------------------------------ -- Edit this bug report at https://bugs.php.net/bug.php?id=76867&edit=1