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16.6 Exercises

  • Use tcpdump or ethereal to capture some real HTTP requests. Save them to a file and replay the requests through Squid. Feel free to modify or delete some of the HTTP headers.

  • Try to make Squid run out of file descriptors.

  • Run tail -f cache.log and start Squid with debug_options set to ALL,3. If that is too overwhelming, try ALL,2.

  • Force Squid to generate a core file by sending each of the following signals: SIGBUS, SIGSEGV, and SIGABRT. Find the core file and use gdb or another debugger to get a stack trace.



    		Preface
    		Chapter 1. Introduction
    		Chapter 2. Getting Squid
    		Chapter 3. Compiling and Installing
    		Chapter 4. Configuration Guide for the Eager
    		Chapter 5. Running Squid
    		Chapter 6. All About Access Controls
    		Chapter 7. Disk Cache Basics
    		Chapter 8. Advanced Disk Cache Topics
    		Chapter 9. Interception Caching
    		Chapter 10. Talking to Other Squids
    		Chapter 11. Redirectors
    		Chapter 12. Authentication Helpers
    		Chapter 13. Log Files
    		Chapter 14. Monitoring Squid
    		Chapter 15. Server Accelerator Mode
    		Chapter 16. Debugging and Troubleshooting
    		16.1 Some Common Problems
    		16.2 Debugging via cache.log
    		16.3 Core Dumps, Assertions, and Stack Traces
    		16.4 Replicating Problems
    		16.5 Reporting a Bug
    		16.6 Exercises
    		Appendix A. Config File Reference
    		Appendix B. The Memory Cache
    		Appendix C. Delay Pools
    		Appendix D. Filesystem Performance Benchmarks
    		Appendix E. Squid on Windows
    		Appendix F. Configuring Squid Clients