Power limiting

#1
Good day,
is there any chance to limit the CPU usage? I have 4 core VPS and when updating XML feeds, the load average from 0.2 is 1.5-2.2. Only 3 sites have, but other 2 will slow too.

My config:
Code:
docRoot                   $VH_ROOT
vhDomain                  $VH_NAME
adminEmails               example@example.com
enableGzip                1
enableIpGeo               1

index  {
  useServer               0
  indexFiles index.php,index.html
}

errorlog /www/wwwlogs/$VH_NAME_ols.error_log {
  useServer               0
  logLevel                ERROR
  rollingSize             10M
}

accesslog /www/wwwlogs/$VH_NAME_ols.access_log {
  useServer               0
  logFormat               '%{X-Forwarded-For}i %h %l %u %t "%r" %>s %b "%{Referer}i" "%{User-Agent}i"'
  logHeaders              5
  rollingSize             10M
  keepDays                10  compressArchive         1
}

scripthandler  {
  add                     lsapi:mysite.com php
}

extprocessor mysite.com {
  type                    lsapi
  address                 UDS://tmp/lshttpd/mysite.com.sock
  maxConns                20
  env                     LSAPI_CHILDREN=20
  initTimeout             600
  retryTimeout            0
  persistConn             1
  pcKeepAliveTimeout      1
  respBuffer              0
  autoStart               1
  path                    /usr/local/lsws/lsphp74/bin/lsphp
  extUser                 www
  extGroup                www
  memSoftLimit            2047M
  memHardLimit            2047M
  procSoftLimit           400
  procHardLimit           500
}

phpIniOverride  {
php_admin_value open_basedir "/tmp/:/www/wwwroot/mysite.com/"
php_value auto_prepend_file /www/wwwroot/mysite.com/wordfence-waf.php
}

expires {
    enableExpires           1
    expiresByType           image/*=A43200,text/css=A43200,application/x-javascript=A43200,application/javascript=A43200,font/*=A43200,application/x-font-ttf=A43200
}

rewrite  {
  enable                  1
  autoLoadHtaccess        1
  include /www/server/panel/vhost/openlitespeed/proxy/mysite.com/urlrewrite/*.conf
  include /www/server/panel/vhost/apache/redirect/mysite.com/*.conf
  include /www/server/panel/vhost/openlitespeed/redirect/mysite.com/*.conf
}
include /www/server/panel/vhost/openlitespeed/proxy/mysite.com/*.conf
 
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