Summary

In this chapter, we have learned to interpret several log files generated by Squid. We had a detailed look at the format codes that Squid uses to construct log messages and how we can construct custom log formats depending on the requirements.

Specifically, we understood cache log, debugged messages generated by Squid, and had a detailed overview of access log and format codes. We customized log messages using several log formats and selectively logged requests to various log files, and enabled the referer and user agent log messages.

We also discussed about rotating log files to prevent unnecessary wastage of disk space.

Now that we have learned about the various log files and log messages, we will go on to learn about using these messages to monitor our proxy server and analyze the performance of our cache, in the next chapter.