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Re: query with bad performance after migration to mysql 5.6
Posted by: Øystein Grøvlen
Date: December 09, 2015 04:21AM

Hi,

The provided optimizer trace is not complete. When the MISSING_BYTES_BEYOND_MAX_MEM_SIZE column of the optimizer_trace table is non-zero, it means that the allocated buffer was to small for the entire trace. To increase the buffer size, change the setting of optimizer_trace_max_mem_size variable.

Thanks,

Øystein Grøvlen,
Senior Principal Software Engineer,
MySQL Group, Oracle,
Trondheim, Norway

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