Why does this SQL UPDATE lock the entire table?
Why does this SQL UPDATE lock the entire table. The SQL code updates with a condition that has no index. In MySQL it locks every row it scans. In SQL services one update blocks all other writes.
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What's wrong with this SQL LOCK WAIT timeout killing requests?
What's wrong with this SQL LOCK WAIT timeout killing requests. The SQL code has default innodb_lock_wait_timeout. In MySQL long held locks cause others to fail. In SQL tune or fix the long transactions.
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Why does this SQL lock table block readers?
Why does this SQL lock table block readers in production. The SQL code runs a long update in a transaction, holding locks and blocking reads. In SQL services this causes latency spikes and timeouts.
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