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 2025-03-14 UTC."],[[["This document provides reference information for various versions of the Memcache environment, ranging from the latest release candidate, version 2.37.0-rc, down to version 2.11.0."],["Environment variables, such as `GOOGLE_CLOUD_CPP_CLOUD_MEMCACHE_ENDPOINT`, can be utilized to configure the library's behavior, especially helpful when troubleshooting issues."],["Tracing for gRPC calls can be enabled using `GOOGLE_CLOUD_CPP_ENABLE_TRACING=rpc`, which allows for the logging of requests and responses, with additional customization options available via `GOOGLE_CLOUD_CPP_TRACING_OPTIONS`."],["Logging within the library can be activated by setting the `GOOGLE_CLOUD_CPP_ENABLE_CLOG=yes` environment variable, enabling the output of log messages to the console."],["The `GOOGLE_CLOUD_PROJECT` variable can be set for use in examples and integration tests to define the project, however, it should be noted that it will not have any direct effect on the library."]]],[]]
