Failed to memlock pages, error: 12 (Cannot allocate memory): Proper LockPagesInMainMemory Option On Linux
Last updated on OCTOBER 23, 2016
Applies to:MySQL Cluster - Version 5.0 and later
Even if LockPagesInMainMemory is set to 1 or 2 and the system has sufficient RAM, it fails to lock memory pages with errno 12. In such case, a warning like below is logged in a data node's node log (e.g. ndb_1_out.log).
This indicates that mlockall(2) system call was failed due to insufficient memory which can be locked.
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