WordPress server keeps running out of memory and crashing, how can I determine and fix the cause?
Does your site include alot of images ??
##EXCEED MEMORYT LIMIT php_value upload_max_filesize 1000M php_value post_max_size 3000M php_value memory_limit 9999999999M php_value max_execution_time 999 php_value max_input_time 999Try Adding the above code into your .htaccess file in the wordpress root. This should help if your browser is crashing and giving memory dump errors. Hope this helps.
if your PHP process using high memory and CPU on your server then I will suggest you please try with PHP-FPM with mpm event modules. You will get better performance with this setup. Once this setup is completed you can install some cache plugins for your word press site.