Hi,
I noticed that sometimes when performing a graceful restart of httpd, the
CPU of the httpd process spikes and does not come down. This happens more
frequently if the web server is under load but can happen even when not
serving traffic. Has anyone else encountered this problem? And what can I
do to resolve this?
I did not notice any error messages in the error log and only see the
following:
Sat May 29 03:33:01.424748 2021] [mpm_worker:notice] [pid 2773:tid
140527163445824] AH00297: SIGUSR1 received. Doing graceful restart
AH00558: httpd: Could not reliably determine the server's fully qualified
domain name, using 127.0.0.1. Set the 'ServerName' directive globally to
suppress this message
[Sat May 29 03:33:01.485368 2021] [http2:warn] [pid 2773:tid
140527163445824] AH02951: mod_ssl does not seem to be enabled
[Sat May 29 03:33:01.485953 2021] [mpm_worker:notice] [pid 2773:tid
140527163445824] AH00292: Apache/2.4.46 () configured -- resuming normal
operations
[Sat May 29 03:33:01.485964 2021] [core:notice] [pid 2773:tid
140527163445824] AH00094: Command line: '/usr/sbin/httpd -D FOREGROUND'
[Sat May 29 03:33:01.486045 2021] [mpm_worker:warn] [pid 2773:tid
140527163445824] AH00291: long lost child came home! (pid 25489)
>From performing a top
top - 17:44:22 up 5 days, 16:04, 1 user, load average: 7.00, 7.13, 8.27
Threads: 384 total, 8 running, 316 sleeping, 0 stopped, 1 zombie
%Cpu(s): 99.8 us, 0.2 sy, 0.0 ni, 0.0 id, 0.0 wa, 0.0 hi, 0.0 si,
0.0 st
KiB Mem : 7807268 total, 4124256 free, 543316 used, 3139696 buff/cache
KiB Swap: 1310716 total, 1310716 free, 0 used. 6949164 avail Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
23677 apache 20 0 2293264 7524 4148 R 58.6 0.1 4582:47 httpd
23664 apache 20 0 2293264 7524 4148 R 58.2 0.1 4581:57 httpd
23636 apache 20 0 2293264 7524 4148 R 57.6 0.1 4582:16 httpd
23660 apache 20 0 2293264 7524 4148 R 57.2 0.1 4580:51 httpd
23698 apache 20 0 2293264 7524 4148 R 56.6 0.1 4582:17 httpd
23648 apache 20 0 2293264 7524 4148 R 55.9 0.1 4580:52 httpd
23668 apache 20 0 2293264 7524 4148 R 53.9 0.1 4581:23 httpd
1 root 20 0 128600 8592 5524 S 0.0 0.1 6:02.91 systemd
Regards
Jay
