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Re: Long query execution, about 1 hr
Posted by: Rick James
Date: February 16, 2011 12:17AM

How many rows have kontakt.grupa = 'OF' ? If it is not too big a percentage of the total rows in kontakt, then this index would help:
INDEX(grupa)

What about kontakt.akcja > 1 ? Then, maybe
INDEX(grupa, akcja)

How much RAM? Can you make innodb_buffer_pool_size, 49283072 bigger? For guidance, see http://mysql.rjweb.org/doc.php/memory

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