We've covered a lot of material in this chapter and looked at one of the larger Drupal contributed modules—a module that provides a huge amount of functionality and tools to the Drupal performance developer. You should now take time to use the Devel module every day during your Drupal development work and get to know each component in greater detail. Here's what we covered:
We looked at recent log entries in order to check on any potential PHP errors or other parse errors that may be occurring on our site. We also looked at the top page not found and access denied errors.
We installed and configured the Devel module and set permissions for our admin users to use the module.
We used the Devel module to check on database queries that occur during our page loads and how long these queries take to run. We also looked for duplicate queries and learned to watch out for those queries that take longer than our threshold millisecond benchmark.
We used the Development block to get easier access...