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prometheus/tsdb
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Filip Petkovski 1f69dcfa6b
Fix reusing float histograms 
In https://github.com/prometheus/prometheus/pull/13276 we started reusing float histogram objects to reduce allocations in PromQL.
That PR introduces a bug where histogram pointers gets copied to the beginning of the histograms slice,
but are still kept in the end of the slice. When a new histogram is read into the last element,
it can overwrite a previous element because the pointer is the same.

This commit fixes the issue by moving outdated points to the end of the slice
so that we don't end up with duplicate pointers in the same buffer. In other words,
the slice gets rotated so that old objects can get reused.

Signed-off-by: Filip Petkovski <filip.petkovsky@gmail.com>
2023-12-14 11:53:58 +01:00
..
agent tsdb: use Go standard errors 2023-12-11 12:18:54 +00:00
chunkenc tsdb: use Go standard errors 2023-12-11 12:18:54 +00:00
chunks Merge branch 'main' into arve/typos 2023-12-12 12:02:03 +01:00
docs Merge branch 'main' into sparsehistogram 2022-08-10 17:54:37 +02:00
encoding tsdb/encoding: use Go standard errors package 2023-11-11 19:01:11 +01:00
errors Enable default revive rules (#13068) 2023-11-29 17:23:34 +00:00
fileutil tsdb/fileutil: use Go standard errors 2023-11-14 19:05:21 +00:00
goversion lint: Adjust to the lint warnings raised by current versions of golint-ci 2023-04-19 17:10:10 +02:00
index Merge pull request #12878 from bboreham/loser-tree 2023-12-12 21:38:30 +00:00
record Enable reusing memory when converting between histogram types 2023-12-08 10:22:59 +01:00
testdata tsdb: Delete blocks atomically; Remove tmp blocks on start; Added test. (#7772) 2020-08-11 06:56:08 +01:00
tombstones Update tombstones.go 2023-11-11 19:22:06 +01:00
tsdbutil Fix reusing float histograms 2023-12-14 11:53:58 +01:00
wlog tsdb: use Go standard errors 2023-12-11 12:18:54 +00:00
.gitignore Moving tsdb into its own subdirectory 2019-08-13 13:58:49 +05:30
block.go tsdb: use Go standard errors 2023-12-11 12:18:54 +00:00
block_test.go Enable reusing memory when converting between histogram types 2023-12-08 10:22:59 +01:00
blockwriter.go tsdb: use Go standard errors 2023-12-11 12:18:54 +00:00
blockwriter_test.go Add a chunk size limit in bytes (#12054) 2023-08-24 15:21:17 +02:00
CHANGELOG.md Rename default branch to main 2021-02-22 20:28:02 +01:00
compact.go tsdb: use Go standard errors 2023-12-11 12:18:54 +00:00
compact_test.go tsdb: use Go standard errors 2023-12-11 12:18:54 +00:00
db.go tsdb: remove unused option (#13282) 2023-12-12 09:58:54 +00:00
db_test.go tsdb: remove unused option (#13282) 2023-12-12 09:58:54 +00:00
example_test.go Add context argument to Querier.Select (#12660) 2023-09-12 12:37:38 +02:00
exemplar.go tsdb: use Go standard errors 2023-12-11 12:18:54 +00:00
exemplar_test.go golangci-lint: enable testifylint linter (#13254) 2023-12-07 11:35:01 +00:00
head.go tsdb: use Go standard errors 2023-12-11 12:18:54 +00:00
head_append.go tsdb: use Go standard errors 2023-12-11 12:18:54 +00:00
head_bench_test.go tsdb: use Go standard errors 2023-12-11 12:18:54 +00:00
head_read.go tsdb: use Go standard errors 2023-12-11 12:18:54 +00:00
head_read_test.go golangci-lint: enable testifylint linter (#13254) 2023-12-07 11:35:01 +00:00
head_test.go tsdb: use Go standard errors 2023-12-11 12:18:54 +00:00
head_wal.go tsdb: use Go standard errors 2023-12-11 12:18:54 +00:00
isolation.go ci(lint): enable predeclared linter 2023-05-21 07:33:54 +00:00
isolation_test.go tsdb: turn off transaction isolation for head compaction (#11317) 2022-09-27 19:31:23 +05:30
mocks_test.go tsdb: use Go standard errors 2023-12-11 12:18:54 +00:00
ooo_head.go Fix issue where queries can fail or omit OOO samples if OOO head compaction occurs between creating a querier and reading chunks (#13115) 2023-11-24 12:38:38 +01:00
ooo_head_read.go Change ChunkReader.Chunk() to ChunkOrIterable() 2023-11-28 11:14:29 +01:00
ooo_head_read_test.go golangci-lint: enable testifylint linter (#13254) 2023-12-07 11:35:01 +00:00
ooo_head_test.go ci(lint): enable godot; append dot at the end of comments 2023-10-31 19:53:38 +02:00
ooo_isolation.go Fix issue where queries can fail or omit OOO samples if OOO head compaction occurs between creating a querier and reading chunks (#13115) 2023-11-24 12:38:38 +01:00
ooo_isolation_test.go Fix issue where queries can fail or omit OOO samples if OOO head compaction occurs between creating a querier and reading chunks (#13115) 2023-11-24 12:38:38 +01:00
querier.go tsdb: use Go standard errors 2023-12-11 12:18:54 +00:00
querier_bench_test.go ci(lint): enable nolintlint and remove redundant comments (#12926) 2023-10-31 12:35:13 +01:00
querier_test.go tsdb: use Go standard errors 2023-12-11 12:18:54 +00:00
README.md Fixed broken link in tsdb README.md 2022-10-07 16:20:20 +00:00
repair.go tsdb: use Go standard errors 2023-12-11 12:18:54 +00:00
repair_test.go Add context argument to IndexReader.Postings (#12667) 2023-09-13 17:45:06 +02:00
tsdbblockutil.go Support FloatHistogram in TSDB (#11522) 2022-12-28 14:25:07 +05:30
wal.go tsdb: use Go standard errors 2023-12-11 12:18:54 +00:00
wal_test.go golangci-lint: enable testifylint linter (#13254) 2023-12-07 11:35:01 +00:00

README.md

TSDB

GoPkg

This directory contains the Prometheus TSDB (Time Series DataBase) library, which handles storage and querying of all Prometheus v2 data.

Documentation

External resources

A series of blog posts explaining different components of TSDB: