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"]],[["Hard to understand","hardToUnderstand","thumb-down"],["Incorrect information or sample code","incorrectInformationOrSampleCode","thumb-down"],["Missing the information/samples I need","missingTheInformationSamplesINeed","thumb-down"],["Other","otherDown","thumb-down"]],["Last updated 2025-03-14 UTC."],[[["The webpage provides documentation for the `SessionPoolKeepAliveIntervalOption` within the Google Cloud Spanner C++ library."],["Version 2.37.0-rc is the latest release candidate, and a comprehensive list of versions is available, ranging from 2.11.0 up to the latest."],["This option configures the frequency at which sessions are refreshed, preventing them from being garbage collected by the backend, due to sessions that have not been used in over 60 minutes."],["The `SessionPoolKeepAliveIntervalOption` type is an alias for `std::chrono::seconds`, which is used to define the time interval for refreshing sessions."]]],[]]
