A number of environment variables can be used to configure the behavior of the library. There are also functions to configure this behavior in code. The environment variables are convenient when troubleshooting problems.
Endpoint Overrides
GOOGLE_CLOUD_CPP_CLOUD_MEMCACHE_ENDPOINT=... overrides the EndpointOption (which defaults to "memcache.googleapis.com") used by MakeCloudMemcacheConnection().
GOOGLE_CLOUD_CPP_ENABLE_TRACING=rpc: turns on tracing for most gRPC calls. The library injects an additional Stub decorator that prints each gRPC request and response. Unless you have configured your own logging backend, you should also set GOOGLE_CLOUD_CPP_ENABLE_CLOG to produce any output on the program's console.
See Also
google::cloud::LoggingComponentsOptionGOOGLE_CLOUD_CPP_TRACING_OPTIONS=...: modifies the behavior of gRPC tracing, including whether messages will be output on multiple lines, or whether string/bytes fields will be truncated.
See Also
google::cloud::GrpcTracingOptionsOptionGOOGLE_CLOUD_CPP_ENABLE_CLOG=yes: turns on logging in the library, basically the library always "logs" but the logging infrastructure has no backend to actually print anything until the application sets a backend or they set this environment variable.
[[["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 2025-03-05 UTC."],[[["This document provides information on configuring the behavior of the C++ Memcache library using environment variables, alongside the ability to configure these behaviors in the code."],["The document lists available versions of the C++ Memcache library, ranging from version 2.11.0 up to the latest release candidate 2.37.0-rc, with each version linking to its specific documentation page."],["Environment variables like `GOOGLE_CLOUD_CPP_CLOUD_MEMCACHE_ENDPOINT` can be used to override the default endpoint for `MakeCloudMemcacheConnection()`, allowing for custom endpoint configurations."],["Logging and tracing for gRPC calls can be enabled and configured using environment variables such as `GOOGLE_CLOUD_CPP_ENABLE_TRACING`, `GOOGLE_CLOUD_CPP_TRACING_OPTIONS`, and `GOOGLE_CLOUD_CPP_ENABLE_CLOG`."],["The `GOOGLE_CLOUD_PROJECT` environment variable is used in examples and tests for setting the GCP project but does not affect the library's runtime behavior."]]],[]]
