InnoDB: Fatal error: cannot allocate memory for the buffer pool
If you see this error in mysql error.log, it means that you don’t have enough free memory space.
InnoDB tries to operate the database in order to check the files but it can’t do its job and will close badly mysql.
In consequence mysql will be put offline and all your database won’t be reachable anymore.
The solution is to create a swap space in your Linux sever.
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