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::TracingComponentsOptionGOOGLE_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 details various versions of the C++ memcache library, ranging from version 2.11.0 up to the latest release candidate 2.37.0-rc."],["Environment variables, such as `GOOGLE_CLOUD_CPP_CLOUD_MEMCACHE_ENDPOINT`, can be used to configure the behavior of the library, including overriding the default endpoint."],["The library supports gRPC call tracing via the `GOOGLE_CLOUD_CPP_ENABLE_TRACING` environment variable, which, when combined with `GOOGLE_CLOUD_CPP_ENABLE_CLOG`, outputs to the program's console."],["Additional environment variables like `GOOGLE_CLOUD_CPP_TRACING_OPTIONS` offer control over gRPC tracing behavior, and `GOOGLE_CLOUD_CPP_ENABLE_CLOG` enables logging within the library."],["The `GOOGLE_CLOUD_PROJECT` variable can be set to help configure the GCP project, but it will only apply in examples and integration tests, not in the library itself."]]],[]]
