runcrawl.php is killed

[online1]

I have a site with 100k++ pages.  So I try to run runcrawl.php(php runcrawl.php) at dedicated server terminal.  It is killed after running for a few minutes, e.g. "[1]+ Killed php runcrawl.php".  Any idea to fix this problem? No new error messages at error_log

[online1]

I have increased max_execution_time to 9999.  The problem is still the same, php script is killed after execution of a few minutes.  Should I upgrade my php 4.4.1?

[XML-Sitemaps Support]

Hello,

perhaps your server has process monitoring service installed that checks the processes and terminates them after certain amount of time. Please check that with your hosting support.