ee1078a03c
This is a much stronger hash function than fnv64a and comparably fast (with super-fast assembly implementation for amd64). Performance is not critical here anyway. The old fnv64a is kept for vectors, where collision detection is in place and the weakness of the hashing doesn't matter that much. I implemented a vector version with xxhash and found that xxhash is slower in all cases except very very high cardinality (where it is only slightly faster). Also, ``xxhash.New`` comes with an allocation of 80 bytes. Thus, to keep vectors alloc-free, we needed to add a `sync.Pool`, which would have an additional performance overhead. Signed-off-by: beorn7 <beorn@grafana.com> |
||
|---|---|---|
| .github | ||
| api | ||
| examples | ||
| prometheus | ||
| .gitignore | ||
| .golangci.yml | ||
| .travis.yml | ||
| CHANGELOG.md | ||
| CONTRIBUTING.md | ||
| Dockerfile | ||
| LICENSE | ||
| MAINTAINERS.md | ||
| Makefile | ||
| Makefile.common | ||
| NOTICE | ||
| README.md | ||
| VERSION | ||
| go.mod | ||
| go.sum | ||
README.md
Prometheus Go client library
This is the Go client library for Prometheus. It has two separate parts, one for instrumenting application code, and one for creating clients that talk to the Prometheus HTTP API.
This library requires Go1.9 or later.
Important note about releases and stability
This repository generally follows Semantic Versioning. However, the API client in prometheus/client_golang/api/… is still considered experimental. Breaking changes of the API client will not trigger a new major release. The same is true for selected other new features explicitly marked as EXPERIMENTAL in CHANGELOG.md.
Features that require breaking changes in the stable parts of the repository are being batched up and tracked in the v2 milestone. The v2 development happens in a separate branch for the time being. v2 releases off that branch will happen once sufficient stability is reached. In view of the widespread use of this repository, v1 and v2 will coexist for a while to enable a convenient transition.
Instrumenting applications
The
prometheus directory
contains the instrumentation library. See the
guide on the Prometheus
website to learn more about instrumenting applications.
The
examples directory
contains simple examples of instrumented code.
Client for the Prometheus HTTP API
The
api/prometheus directory
contains the client for the
Prometheus HTTP API. It allows you
to write Go applications that query time series data from a Prometheus
server. It is still in alpha stage.
Where is model, extraction, and text?
The model packages has been moved to
prometheus/common/model.
The extraction and text packages are now contained in
prometheus/common/expfmt.
Contributing and community
See the contributing guidelines and the Community section of the homepage.