I got a question here. We setup to run (/usr/bin/php /etc/sphinx/sphinx-cron.php delta 2>&1 > /dev/null) every 10 minutes in VBulletin. it looks like every time around when the indexing is going on, queries back up and result in the web server load shooting up. We start homing in onto Sphinx indexing because that is the only cron job that happens as the same frequency and timing of the lock up. We did not have this problem before and the lockup is getting worse. It is getting longer and it is taking longer for the servers to recover. Any suggestions as to how to deal with this issue?