#! perl

# restart server when certain resource limits are exceeded

our $MAX_VMSIZE  = $cf::CFG{checkrusage}{vmsize} || 1_000_000_000;

$^O eq "linux" or die "only linux supported right now.\n";

Event->timer (
   reentrant => 0,
   data      => cf::WF_AUTOCANCEL,
   interval  => 10,
   after     => 10,
   cb        => sub {
      open my $fh, "</proc/self/stat"
         or return;

      sysread $fh, my $stat, 4096; # only a single line
      my $vmsize = (split / /, $stat)[22];

      cf::cleanup "memory usage growing high, server would run out of memory soon", 0
         if $vmsize >= $MAX_VMSIZE;
   },
);