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Error: SQLSTATE[HY000]: General error: 23 Out of resources when opening file ‘/tmp/#sql_751_0.MYD’ (Errcode: 24 – Too many open files)

Lösung:

/etc/security/limits.conf anpassen:
root             soft    nofile           800000
root             hard    nofile           1024000

/etc/mysql/my.cnf anpassen:
open_files_limit = 1024000

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