All Of The Sudden Db Crashed

Store Builder Questions
1

Getting this error

Table './DB/cscart_sessions' is marked as crashed and should be repaired (145)

SELECT * FROM cscart_sessions WHERE session_id = '88f9081297ff6959364354c8011f81fe_0_A'

4.2.2 version. Plenty of resources, disk space. One instance server data usage graphs shown usage from average cpu 1-2 to 180-200. Network usage from 1-2mbs to 20mbs.

Can it be hacking doss attempt?

2

Repair table from phpMyAdmin. Such things happen.

3

You'd have to review your system logs to determine if it was the result of a DOS attack or not. Obviously something made mysqld crash and left the table in an unknown state.

4

Main error was "(errno: 24)" that is related to open_files_limit for mysql. As some other forums advice increased 1024 number to 100000.