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Bug #1173311
Comment #1

Comment 1 for bug 1173311

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Daniel Nichter (daniel-nichter) wrote on 2013-05-03: Re: pt-online-schema-change results in many more deadlocks under MySQL 5.56

I'm not sure why MySQL 5.6 would deadlock more than PS 5.5. Are you using the same version of pt-online-schema-change? Can you provide any more insight into what's happen, like what's deadlocking, what lock-wait timeouts you're using, etc.