Solve php-fpm consume high CPU usage 100% 200%

Solve php-fpm consume high CPU usage 100% 200%

Suddenly my server crashed and I see that php5-fpm usage was the culprit and it’s consume 100% of CPU usage. Fyi, I use NGINX and WordPress on this case. I tried several thing to solve php-fpm issue like change listener into socket instead of ports. Also, I use APC as well, but it’s doesn’t works.

Until I found solution was using Varnish. Here is a quick step to install Varnish for WordPress on your server ( I use debian ):

1. Install Varnish on Debian

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apt-get install varnish


2. Set up varnish
Edit /etc/default/varnish:

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#

# Should we start varnishd at boot?  Set to "yes" to enable.
START=yes

# Maximum number of open files (for ulimit -n)
NFILES=131072

# Maximum locked memory size (for ulimit -l)
# Used for locking the shared memory log in memory.  If you increase log size,
# you need to increase this number as well
MEMLOCK=82000

# Default varnish instance name is the local nodename.  Can be overridden with
# the -n switch, to have more instances on a single server.
INSTANCE=$(uname -n)

# Listen on port 6081, administration on localhost:6082, and forward to
# one content server selected by the vcl file, based on the request.  Use a 1GB
# fixed-size cache file.
#
DAEMON_OPTS="-a :80
             -T localhost:6082
             -f /etc/varnish/default.vcl
             -s file,/var/lib/varnish/$INSTANCE/varnish_storage.bin,1G"

At this configuration, I set that Varnish service start using port 80.

3. Setup Varnish
Edit /etc/varnish/default.vcl

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backend default {
  .host = "127.0.0.1";
  .port = "82";
}
# Drop any cookies sent to WordPress.
sub vcl_recv {
    if (!(req.url ~ "wp-(login|admin)")) {
        unset req.http.cookie;
    }
}

# Drop any cookies WordPress tries to send back to the client.
sub vcl_fetch {
    if (!(req.url ~ "wp-(login|admin)")) {
        unset beresp.http.set-cookie;
    }
}

At this example, my website running on NGINX with port 82.

Now, all you need just start NGINX and Varnish service. PHP5-FPM usage must be decrease now.

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