nginx и apache ооочень часто перезагружаются? судя по логам

[ruport]

Есть нагруженный сервер Ubuntu 16.04+VestaCP, а так же новый пустой VDS Ubuntu 16.04+VestaCP. На обоих наблюдаю одинаковую странную картину в логах /var/log/syslog. Будто apache и nginx перезагружаются очень часто. Чуть ли ни каждую секунду. Что это? Нормально?

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Nov  9 09:24:55 241230 systemd[1]: Reloading LSB: Apache2 web server.
Nov  9 09:24:55 241230 apache2[6505]:  * Reloading Apache httpd web server apache2
Nov  9 09:24:56 241230 apache2[6505]:  *
Nov  9 09:24:56 241230 systemd[1]: Reloaded LSB: Apache2 web server.
Nov  9 09:24:56 241230 systemd[1]: Stopping nginx - high performance web server...
Nov  9 09:24:56 241230 systemd[1]: Stopped nginx - high performance web server.
Nov  9 09:24:56 241230 systemd[1]: Starting nginx - high performance web server...
Nov  9 09:24:56 241230 systemd[1]: nginx.service: PID file /var/run/nginx.pid not readable (yet?) after start: No such file or directory
Nov  9 09:24:56 241230 systemd[1]: Started nginx - high performance web server.
Nov  9 09:25:01 241230 cron[2066]: (admin) RELOAD (crontabs/admin)
Nov  9 09:25:01 241230 CRON[6626]: (admin) CMD (sudo /usr/local/vesta/bin/v-update-sys-rrd)
Nov  9 09:25:01 241230 CRON[6627]: (admin) CMD (sudo /usr/local/vesta/bin/v-update-sys-queue letsencrypt)
Nov  9 09:25:01 241230 CRON[6628]: (admin) CMD (sudo /usr/local/vesta/bin/v-update-sys-queue backup)
Nov  9 09:25:16 241230 systemd[1]: Stopping nginx - high performance web server...
Nov  9 09:25:16 241230 systemd[1]: Stopped nginx - high performance web server.
Nov  9 09:25:16 241230 systemd[1]: Starting nginx - high performance web server...
Nov  9 09:25:16 241230 systemd[1]: nginx.service: PID file /var/run/nginx.pid not readable (yet?) after start: No such file or directory
Nov  9 09:25:16 241230 systemd[1]: Started nginx - high performance web server.
Nov  9 09:25:16 241230 systemd[1]: Reloading LSB: Apache2 web server.
Nov  9 09:25:16 241230 apache2[7124]:  * Reloading Apache httpd web server apache2
Nov  9 09:25:16 241230 apache2[7124]:  *
Nov  9 09:25:16 241230 systemd[1]: Reloaded LSB: Apache2 web server.
Nov  9 09:25:21 241230 systemd[1]: Stopping nginx - high performance web server...
Nov  9 09:25:21 241230 systemd[1]: Stopped nginx - high performance web server.
Nov  9 09:25:21 241230 systemd[1]: Starting nginx - high performance web server...
Nov  9 09:25:21 241230 systemd[1]: nginx.service: PID file /var/run/nginx.pid not readable (yet?) after start: No such file or directory
Nov  9 09:25:21 241230 systemd[1]: Started nginx - high performance web server.
Nov  9 09:25:21 241230 systemd[1]: Reloading LSB: Apache2 web server.
Nov  9 09:25:22 241230 apache2[7422]:  * Reloading Apache httpd web server apache2
Nov  9 09:25:22 241230 apache2[7422]:  *
Nov  9 09:25:22 241230 systemd[1]: Reloaded LSB: Apache2 web server.
Nov  9 09:25:26 241230 systemd[1]: Stopping nginx - high performance web server...
Nov  9 09:25:26 241230 systemd[1]: Stopped nginx - high performance web server.
Nov  9 09:25:26 241230 systemd[1]: Starting nginx - high performance web server...
Nov  9 09:25:26 241230 systemd[1]: nginx.service: PID file /var/run/nginx.pid not readable (yet?) after start: No such file or directory
Nov  9 09:25:26 241230 systemd[1]: Started nginx - high performance web server.
Nov  9 09:25:26 241230 systemd[1]: Reloading LSB: Apache2 web server.
Nov  9 09:25:26 241230 apache2[7770]:  * Reloading Apache httpd web server apache2
Nov  9 09:25:26 241230 apache2[7770]:  *
Nov  9 09:25:26 241230 systemd[1]: Reloaded LSB: Apache2 web server.
Nov  9 09:25:28 241230 systemd[1]: Stopping nginx - high performance web server...
Nov  9 09:25:28 241230 systemd[1]: Stopped nginx - high performance web server.
Nov  9 09:25:28 241230 systemd[1]: Starting nginx - high performance web server...
Nov  9 09:25:28 241230 systemd[1]: nginx.service: PID file /var/run/nginx.pid not readable (yet?) after start: No such file or directory
Nov  9 09:25:28 241230 systemd[1]: Started nginx - high performance web server.
Nov  9 09:25:28 241230 systemd[1]: Reloading LSB: Apache2 web server.
Nov  9 09:25:28 241230 apache2[7865]:  * Reloading Apache httpd web server apache2
Nov  9 09:25:28 241230 apache2[7865]:  *
Nov  9 09:25:28 241230 systemd[1]: Reloaded LSB: Apache2 web server.
Nov  9 09:30:01 241230 CRON[8088]: (admin) CMD (sudo /usr/local/vesta/bin/v-update-sys-queue letsencrypt)
Nov  9 09:30:01 241230 CRON[8089]: (admin) CMD (sudo /usr/local/vesta/bin/v-update-sys-rrd)
Nov  9 09:30:01 241230 CRON[8091]: (admin) CMD (sudo /usr/local/vesta/bin/v-update-sys-queue backup)
Nov  9 09:30:06 241230 systemd[1]: Stopping nginx - high performance web server...
Nov  9 09:30:06 241230 systemd[1]: Stopped nginx - high performance web server.
Nov  9 09:30:06 241230 systemd[1]: Starting nginx - high performance web server...
Nov  9 09:30:06 241230 systemd[1]: nginx.service: PID file /var/run/nginx.pid not readable (yet?) after start: No such file or directory
Nov  9 09:30:06 241230 systemd[1]: Started nginx - high performance web server.
Nov  9 09:30:06 241230 systemd[1]: Reloading LSB: Apache2 web server.
Nov  9 09:30:06 241230 apache2[8445]:  * Reloading Apache httpd web server apache2
Nov  9 09:30:06 241230 apache2[8445]:  *
Nov  9 09:30:06 241230 systemd[1]: Reloaded LSB: Apache2 web server.
Nov  9 09:30:07 241230 systemd[1]: Stopping nginx - high performance web server...
Nov  9 09:30:07 241230 systemd[1]: Stopped nginx - high performance web server.
Nov  9 09:30:07 241230 systemd[1]: Starting nginx - high performance web server...
Nov  9 09:30:07 241230 systemd[1]: nginx.service: PID file /var/run/nginx.pid not readable (yet?) after start: No such file or directory
Nov  9 09:30:07 241230 systemd[1]: Started nginx - high performance web server.
Nov  9 09:30:07 241230 systemd[1]: Reloading LSB: Apache2 web server.
Nov  9 09:30:07 241230 apache2[8539]:  * Reloading Apache httpd web server apache2
Nov  9 09:30:07 241230 apache2[8539]:  *
Nov  9 09:30:07 241230 systemd[1]: Reloaded LSB: Apache2 web server.