Aliaksandr Valialkin
1a3a6ef907
lib/mergeset: use deterministic random generator in tests
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Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/3683
2023-01-23 19:43:49 -08:00
Aliaksandr Valialkin
343c69fc15
lib/{mergeset,storage}: pass compressLevel to blockStreamWriter.InitFromInmemoryPart
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This allows packing in-memory blocks with different compression levels
depending on its contents. This may save memory usage.
2022-12-03 22:46:48 -08:00
Aliaksandr Valialkin
a4140de9e6
lib/mergeset: unconditionally cache indexdb blocks
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Production workloads show that indexdb blocks must be cached unconditionally for reducing CPU usage.
This shouldn't increase memory usage too much, since unused blocks are removed from the cache every two minutes.
2021-02-09 00:47:50 +02:00
Aliaksandr Valialkin
e7959094f6
lib/storage: remove prioritizing of merging small parts over merging big parts, since it doesn't work as expected
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The prioritizing could lead to big merge starvation, which could end up in too big number of parts that must be merged into big parts.
Multiple big merges may be initiated after the migration from v1.39.0 or v1.39.1. It is OK - these merges should be finished soon,
which should return CPU and disk IO usage to normal levels.
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/648
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/618
2020-07-30 19:57:27 +03:00
Aliaksandr Valialkin
6f05c4d351
lib/storage: improve prioritizing of data ingestion over querying
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Prioritize also small merges over big merges.
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/291
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/648
2020-07-23 13:23:36 +03:00
Aliaksandr Valialkin
d5dddb0953
all: use %w instead of %s for wrapping errors in fmt.Errorf
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This will simplify examining the returned errors such as httpserver.ErrorWithStatusCode .
See https://blog.golang.org/go1.13-errors for details.
2020-06-30 23:05:11 +03:00
Aliaksandr Valialkin
0eacea1de1
lib/{storage,mergeset}: further tuning of compression levels depending on block size
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This should improve performance for querying newly added data, since it can be unpacked faster.
2020-05-15 13:24:37 +03:00
Aliaksandr Valialkin
aebc45ad26
lib/{mergeset,storage}: do not cache inverted index blocks containing tag->metricIDs items
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This should reduce the amounts of used RAM during queries with filters over big number of time series.
2019-09-25 14:02:15 +03:00
Aliaksandr Valialkin
0686ac52c3
lib/{storage,mergeset}: merge tag->metricID rows into tag->metricIDs rows for common tag values
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This should improve lookup performance if the same `label=value` pair exists
in big number of time series.
This should also reduce memory usage for mergeset data cache, since `tag->metricIDs` rows
occupy less space than the original `tag->metricID` rows.
2019-09-20 22:06:41 +03:00
Aliaksandr Valialkin
56c154f45b
all: add vm_data_size_bytes metrics for easy monitoring of on-disk data size and on-disk inverted index size
2019-07-04 19:42:30 +03:00
Aliaksandr Valialkin
1836c415e6
all: open-sourcing single-node version
2019-05-23 00:18:06 +03:00
