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: Feedback
+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:
Ok, strace seems to tell me that process seems to hang at:
madvise(0x7f70efe00000, 2097152, MADV_HUGEPAGE) = 0
Any ideas?
Thanks!
Previous Comments:
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[2018-09-12 08:40:02] requinix@php.net
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.
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[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
................
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[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.
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[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.
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[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)
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