Does the database crash during a DDOS attack Yii framework?

Question

MySQL

Hello everyone
There is a site written in Yii.
There is a dedicated machine for hosting, the server is monitored by the admin.
But when ddos ​​only 100-200 bots, the server database falls off
. Error: Cdbconnection Failed To Open The Db Connection
Moreover, requests go to the main page. And the main page uses 2 requests to the database, and then it throws them into the cache for 10 minutes
. And the database still disappears, apparently the script passes authorization in the database, how to disable it if there are no requests and there is data in the cache
Here is a small log [ Yii ver: 1.1.15 ] [ Memory: 3364.52Kb ] [ Time: 0.084 ] [ DB Query: 0 ] [ App Log ]

Answer 1

See database logs.
Maybe the problem is the number of connections?

Answer 2

persistent connection through p: host (mysqli), then check the number of connections to the database and sleep well.

Answer 3

See database logs.

Answer 4

Actually, the admin should decide this, 100-200 bots are not ddos, this is a schoolboy dabbles in programming.

Answer 5

The basis falls most likely because of a lack of memory. Configure the web server and DBMS for the number of threads - make them less than simultaneously running. Enable DB caching