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The Casual MySQL DBA – Operational Basics
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So your not a MySQL DBA, but you have to perform like one. If you have a production environment that’s running now, what are the first things you do when it’s not running or reported as not running?

  1. Are the MySQL processes running? (i.e. mysqld and mysqld_safe)
  2. Can you connect locally via cli?
  3. What’s in the MySQL error log?
  4. What are current MySQL threads doing? Locked? long running? how many? idle sources?
  5. Can you connect remotely via cli?
  6. Verify free diskspace?
  7. Verify system physical resources?
  8. If this is a slave, is MySQL replication …
  [Read more...]
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