The specialized version of sample add to the ring:
func addH(s hSample, buf []hSample, r *sampleRing) []hSample
func addFH(s fhSample, buf []fhSample, r *sampleRing) []fhSample
already correctly copy histogram samples from the reused hReader, fhReader
buffers, but the generic version does not. This means that the
data is overwritten on the next read if the sample ring has seen histogram
and float samples at the same time and switched to generic mode.
The `genericAdd` function (which was commented anyway) is by now quite
different from the specialized functions so that this commit deletes
it.
Signed-off-by: György Krajcsovits <gyorgy.krajcsovits@grafana.com>
We are still seeing lock contention on MemPostings.mtx, and MemPostings.Delete() is by far the most expensive operation on that mutex.
This adds parallelism to that method, trying to reduce the amount of time we spend with the mutex held.
Signed-off-by: Oleg Zaytsev <mail@olegzaytsev.com>
If the query overlaps the range currently undergoing compaction, we
should only fetch chunks up to that time. Need to store that min time
in `HeadAndOOOIndexReader`.
Signed-off-by: Bryan Boreham <bjboreham@gmail.com>
If the query overlaps the range currently undergoing compaction, we
should only fetch chunks up to that time. Need to store that min time
in `HeadAndOOOIndexReader`.
Signed-off-by: Bryan Boreham <bjboreham@gmail.com>
Instead of a 2-bit write followed by a 14-bit write, do two 8-bit
writes, which goes much faster since it avoids looping.
Signed-off-by: Bryan Boreham <bjboreham@gmail.com>
Benchmarks must do the same work N times.
Run 3 cases, where the values are constant, vary a bit, and vary a lot.
Also aim for 120 samples same as TSDB default.
Signed-off-by: Bryan Boreham <bjboreham@gmail.com>
Shortcut for `.*` matches newlines as well.
Add preamble change ^(?s:
Add test
dotAll flag por al regex
Add and fix regex tests
Signed-off-by: Mario Fernandez <mariofer@redhat.com>
Several regexps were coded like `"^.*$"`, which is an unnatural
formulation nobody is likely to use. Inside `NewMatcher`, `^` and `$`
are added anyway, which makes the form in the benchmark redundant.
It even printed it out in the expected way.
Signed-off-by: Bryan Boreham <bjboreham@gmail.com>
* tsdb: mmapCurrentOOOHeadChunk prepare for multiple ooo chunks
Currently float samples can only create a single ooo head chunk, but
native histograms can result in multiple due to counter resets, etc.
Signed-off-by: György Krajcsovits <gyorgy.krajcsovits@grafana.com>
* tsdb: getOOOSeriesChunks prepare for multiple ooo chunks
Currently float samples can only create a single ooo head chunk, but
native histograms can result in multiple due to counter resets, etc.
Signed-off-by: György Krajcsovits <gyorgy.krajcsovits@grafana.com>
---------
Signed-off-by: György Krajcsovits <gyorgy.krajcsovits@grafana.com>
Check if headQuerier is nil before trying to use it.
* TestQueryOOOHeadDuringTruncate: unit test to check query during truncate
Regression test for #14822
* Simulate race between query and Compact()
Signed-off-by: György Krajcsovits <gyorgy.krajcsovits@grafana.com>
promql, tsdb (histograms): Do not re-use spans between histograms
When multiple points exist with the same native histogram schemas they
share their spans.
This causes a problem when a native histogram (NH) schema is modified (for example, during
a Sum) then the other NH's with the same spans are also modified. As such,
we should create a new Span for each NH. This will ensure NH's interfaces
are safe to use without considering the effect on other histograms.
At the moment this doesn't present itself as a problem because in all
aggregations and functions operating on native histograms they are copied
by the promql query engine first.
Signed-off-by: Joshua Hesketh <josh@nitrotech.org>
---------
Signed-off-by: Joshua Hesketh <josh@nitrotech.org>
This was part of #14525 which was reverted.
I still think that having this benchmark committed in to the repo is
useful.
Signed-off-by: Oleg Zaytsev <mail@olegzaytsev.com>
Starts its index from 0 , but users call Next() before first sample
so it needs to start from -1
Signed-off-by: György Krajcsovits <gyorgy.krajcsovits@grafana.com>
`getOOOSeriesChunks` was already finding sets of overlapping chunks; we
store those in a `multiMeta` struct so that `ChunkOrIterable` can
reconstruct an `Iterable` easily and predictably.
We no longer need a `MergeOOO` flag to indicate that this Meta should
be merged with other ones; this is explicit in the `multiMeta` structure.
We also no longer need `chunkMetaAndChunkDiskMapperRef`.
Add `wrapOOOHeadChunk` to defeat `chunkenc.Pool` - chunks are reset
during compaction, but if we wrap them (like `safeHeadChunk` was doing
then this is skipped) .
Signed-off-by: Bryan Boreham <bjboreham@gmail.com>
Matthieu MOREL