Session saving in memcache. Сheckout page is load 16sec. From xdebug profiling i found out that the problem in function Magento\Framework\Session->regenerateId() session_start() exec 15 sec.

Why it so?

p.s if session save path set to file then problem is solving.

1 Answer 1


It is probably due to this core bug, which was patched in Magento 2.2.2: https://github.com/magento/magento2/issues/12385

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