Samuel Scott's September 2016 presentation on server log analysis at MozCon in Seattle, Washington. He goes through log data in general and then talks about how to find and fix problems that are found in server logs specifically.

2. that Google’s data can be
wrong?
WHAT IF I TOLD YOU…

3. What Google Says
662 page requests

4. What’s Actually in Server Logs
546 page requests!

5. What is Log Data?

6. What’s Actually in Server Logs

7. The ELK Stack

8. Visualizing Server Log Data

9. system administration
monitoring
troubleshooting
DevOps
QA
IoT
business analysis
product management
customer success
customer support
technical SEO
security and compliance
Why Do Log Analysis?

10. A Server Log Entry

11. A Server Log File

12. What to Check
• Bot crawl volume
• Response code errors
• Temporary redirect
• Bot crawl priority
• Last crawl date
• Crawl budget waste

13. Bot Crawl Volume

14. Response Code Errors

15. Temporary Redirects

16. Crawl Priorities

17. Last Crawl Date

18. Crawl Waste

19. Crawl Waste

20. Resources
• Introductions to Apache, IIS, NGINX, and Windows server log analysis
• Tutorials on Elasticsearch, Logstash, and Kibana (the open source
ELK Stack)
• ELK Apps for Apache, IIS, NGINX, and Windows servers
• The Complete Guide to the ELK Stack
• Log Analysis in AWS Environments with the ELK Stack
• Log Analysis for Technical SEO (my Moz essay)