Option for google::cloud::Options to set the interval at which we refresh sessions so they don't get collected by the backend GC.
The GC collects objects older than 60 minutes, so any duration below that (less some slack to allow the calls to be made to refresh the sessions) should suffice.
[[["Easy to understand","easyToUnderstand","thumb-up"],["Solved my problem","solvedMyProblem","thumb-up"],["Other","otherUp","thumb-up"]],[["Missing the information I need","missingTheInformationINeed","thumb-down"],["Too complicated / too many steps","tooComplicatedTooManySteps","thumb-down"],["Out of date","outOfDate","thumb-down"],["Samples / code issue","samplesCodeIssue","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-08-22 UTC."],[[["\u003cp\u003eThis webpage provides documentation for the \u003ccode\u003eSessionPoolKeepAliveIntervalOption\u003c/code\u003e within the Google Cloud Spanner C++ library, spanning versions from 2.11.0 to 2.37.0-rc.\u003c/p\u003e\n"],["\u003cp\u003eThe \u003ccode\u003eSessionPoolKeepAliveIntervalOption\u003c/code\u003e is used to configure the frequency at which sessions are refreshed, preventing them from being garbage collected by the backend.\u003c/p\u003e\n"],["\u003cp\u003eThe garbage collection process on the backend removes objects older than 60 minutes, so intervals below this value are recommended for the \u003ccode\u003eSessionPoolKeepAliveIntervalOption\u003c/code\u003e.\u003c/p\u003e\n"],["\u003cp\u003eThis option is a type alias for \u003ccode\u003estd::chrono::seconds\u003c/code\u003e, allowing for the specification of refresh intervals in seconds.\u003c/p\u003e\n"]]],[],null,[]]
