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583f3e587c
Optimize histogram iterators Histogram iterators allocate new objects in the AtHistogram and AtFloatHistogram methods, which makes calculating rates over long ranges expensive. In #13215 we allowed an existing object to be reused when converting an integer histogram to a float histogram. This commit follows the same idea and allows injecting an existing object in the AtHistogram and AtFloatHistogram methods. When the injected value is nil, iterators allocate new histograms, otherwise they populate and return the injected object. The commit also adds a CopyTo method to Histogram and FloatHistogram which is used in the BufferedIterator to overwrite items in the ring instead of making new copies. Note that a specialized HPoint pool is needed for all of this to work (`matrixSelectorHPool`). --------- Signed-off-by: Filip Petkovski <filip.petkovsky@gmail.com> Co-authored-by: George Krajcsovits <krajorama@users.noreply.github.com> |
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| .. | ||
| agent | ||
| chunkenc | ||
| chunks | ||
| docs | ||
| encoding | ||
| errors | ||
| fileutil | ||
| goversion | ||
| index | ||
| record | ||
| testdata | ||
| tombstones | ||
| tsdbutil | ||
| wlog | ||
| .gitignore | ||
| block_test.go | ||
| block.go | ||
| blockwriter_test.go | ||
| blockwriter.go | ||
| CHANGELOG.md | ||
| compact_test.go | ||
| compact.go | ||
| db_test.go | ||
| db.go | ||
| example_test.go | ||
| exemplar_test.go | ||
| exemplar.go | ||
| head_append.go | ||
| head_bench_test.go | ||
| head_read_test.go | ||
| head_read.go | ||
| head_test.go | ||
| head_wal.go | ||
| head.go | ||
| isolation_test.go | ||
| isolation.go | ||
| mocks_test.go | ||
| ooo_head_read_test.go | ||
| ooo_head_read.go | ||
| ooo_head_test.go | ||
| ooo_head.go | ||
| ooo_isolation_test.go | ||
| ooo_isolation.go | ||
| querier_bench_test.go | ||
| querier_test.go | ||
| querier.go | ||
| README.md | ||
| repair_test.go | ||
| repair.go | ||
| tsdbblockutil.go | ||
| wal_test.go | ||
| wal.go | ||
TSDB
This directory contains the Prometheus TSDB (Time Series DataBase) library, which handles storage and querying of all Prometheus v2 data.
Documentation
External resources
- A writeup of the original design can be found here.
- Video: Storing 16 Bytes at Scale from PromCon 2017.
- Compression is based on the Gorilla TSDB white paper.
A series of blog posts explaining different components of TSDB: