mysql - Query takes long time on 'statistics' state -

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one of query takes long time(more 300 seconds) executing simple query. , fails in statistics state.

it happens while concurrent execution of same query.

"select 1 <table_name> id = <value> update"

even, have 'optimizer_search_depth' config 0 , buffer size has 14gb.

select .... update sets read lock on rows returns until transaction done, therefor when call same query multiple times @ same time, other ones have wait locks released

i guess using innodb engine table?

please see innodb-locking-reads further information on locking "for update"


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