Does $lastPing and $failedPings in Connection is preserved during subsequent requests?

According to documentation in official PHP client (, if a node fails then it will be marked as dead for 60*2^x (x - $failedPings) seconds. It seems to work during one request but during next request, each node is checked again.

Are these params preserved during the subsequent request? In the client, I do not see any usage of APCu or something that could save it for next request but maybe I'm missing something.

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