* docs: Add link to best practices in "Defining Recording Rules" page
Signed-off-by: John Carlo Roberto <10111643+Irizwaririz@users.noreply.github.com>
* docs: Improve wording
Signed-off-by: John Carlo Roberto <10111643+Irizwaririz@users.noreply.github.com>
Signed-off-by: John Carlo Roberto <10111643+Irizwaririz@users.noreply.github.com>
This adds negative buckets and access of float histograms to
TestHistogramChunkSameBuckets and TestHistogramChunkBucketChanges.
It also exercises a specific pattern of reusing an iterator (one where
no access has happened).
This exposes two bugs (where entries for positive buckets where used
where the corresponding entries for negative buckets should have been
used). One was fixed in #11627 (not merged), which triggered the work
in this commit.
This commit fixes both issues, so #11627 can be closed.
It also simplifies the code in the histogramIterator.Next method that
aims to recycle existing slice capacity.
Furthermore, this is on top of the release-2.40 branch because we
should probably cut a bugfix release for this.
Signed-off-by: beorn7 <beorn@grafana.com>
Typical parameters are one hour by 1 minute step, where the
function would allocate a slice of 3.6 million samples instead of 60.
Signed-off-by: Bryan Boreham <bjboreham@gmail.com>
* Switch from 'sanity' to more inclusive lanuage
"Removing ableist language in code is important; it helps to create and
maintain an environment that welcomes all developers of all backgrounds,
while emphasizing that we as developers select the most articulate,
precise, descriptive language we can rather than relying on metaphors.
The phrase sanity check is ableist, and unnecessarily references mental
health in our code bases. It denotes that people with mental illnesses
are inferior, wrong, or incorrect, and the phrase sanity continues to be
used by employers and other individuals to discriminate against these
people."
From https://gist.github.com/seanmhanson/fe370c2d8bd2b3228680e38899baf5cc
Signed-off-by: Bryan Boreham <bjboreham@gmail.com>
For performance reasons we may use a different implementation of Hash()
in future, so note this so callers can be warned.
Signed-off-by: Bryan Boreham <bjboreham@gmail.com>
Inverting the test for chunks deleted by tombstones makes all three
rejections consistent, and also avoids the case where a chunk is
excluded but still causes `trimFront` or `trimBack` to be set.
Signed-off-by: Bryan Boreham <bjboreham@gmail.com>
This reduces garbage, hence goes faster, when a short time range is
required compared to the amount of chunks in the block. For example
recording rules and alerts often look only at the last few minutes.
Signed-off-by: Bryan Boreham <bjboreham@gmail.com>
* Common client in EC2 and Lightsail
Signed-off-by: Levi Harrison <git@leviharrison.dev>
* Azure -> AWS
Signed-off-by: Levi Harrison <git@leviharrison.dev>
Signed-off-by: Levi Harrison <git@leviharrison.dev>
* file sd: create and increment an inotify error counter when file-SD is unable to watch files. Additionally, order metrics alphabetically.
Signed-off-by: Michael Fuller <mfuller@digitalocean.com>
* file.go: consistent naming and help for prometheus_sd_file_watcher_errors_total
Signed-off-by: Michael Fuller <mfuller@digitalocean.com>
Signed-off-by: Michael Fuller <mfuller@digitalocean.com>
Co-authored-by: Michael Fuller <mfuller@digitalocean.com>
* remote/read_handler: pool input to Marshal()
Use a sync.Pool to reuse byte slices between calls to Marshal() in the
remote read handler.
Signed-off-by: Giedrius Statkevičius <giedrius.statkevicius@vinted.com>
* remote: add microbenchmark for remote read handler
Signed-off-by: Giedrius Statkevičius <giedrius.statkevicius@vinted.com>
Signed-off-by: Giedrius Statkevičius <giedrius.statkevicius@vinted.com>
* Add BenchmarkOpenBlock
* Use specific types when reading offset table
Instead of reading a generic-ish []string, we can read a generic type
which would be specifically labels.Label.
This avoid allocating a slice that escapes to the heap, making it both
faster and more efficient in terms of memory management.
* Update error message for unexpected number of keys
* s/posting offset table/postings offset table/
* Remove useless lastKey assignment
* Use two []bytes vars, simplify
Applied PR feedback: removed generics, moved the label indices reading
to that specific test as we're not using it in production anyway, we're
just testing what we've just built.
Also using two []bytes variables for name and value that use the backing
buffer instead of using strings, this reduces allocations a lot as we
only copy them when we store them (this is optimized by the compiler).
* Fix the dumb bug
Signed-off-by: Oleg Zaytsev <mail@olegzaytsev.com>
Co-authored-by: Marco Pracucci <marco@pracucci.com>
