After re-indexing the Magento 1.9.1
- It freezes for some time and
- Gives 505 error as shown in below snapshot.
I contacted server administrator they say its Magento problem server is working perfectly.
- There is no error in server log neither in Magento log file
Any suggestion how to resolve this ?
Thank You.

https://www.fastcomet.com/community/how-to-clear-logs-and-reduce-database-size-in-magento/
– Dhaval Solanki Apr 13 '17 at 06:19