Aliaksandr Valialkin
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539498058e
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lib/atomicutil: add CacheLineSize const equal to the size of CPU cache line, and use this const for padding against false sharing across the code base
This should reduce the waste of memory on the padding from 128 bytes to 64 bytes on GOARCH=amd64,
while preserving bigger padding for platforms with bigger cache line sizes.
See https://stackoverflow.com/questions/68320687/why-are-most-cache-line-sizes-designed-to-be-64-byte-instead-of-32-128byte-now
Thanks to @tIGO for the hint
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2025-06-06 10:21:40 +02:00 |
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Aliaksandr Valialkin
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1f5d02e059
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lib: make sure that frequently updated global counters are padded in order to protect from false sharing issues on multi-CPU systems
Go linker packs global variables close to each other in the memory. This may lead to false sharing (https://en.wikipedia.org/wiki/False_sharing)
among these variables if frequently updated vars are put close to mostly read-only vars like described
at https://github.com/VictoriaMetrics/VictoriaMetrics/issues/8682 .
This commit adds padding to frequently updated global vars. This guarantees that these variables are put into distinct CPU cache lines
comparing to the rest of global variables. See https://github.com/VictoriaMetrics/VictoriaMetrics/pull/8683#issuecomment-2943254119
Thanks to @tIGO for the intial attempt to fix the issue at https://github.com/VictoriaMetrics/VictoriaMetrics/pull/8683
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2025-06-05 11:40:20 +02:00 |
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Aliaksandr Valialkin
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589ee65c83
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lib/atomicutil: rename Slice.GetSlice to Slice.All for the sake of better readability
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2025-04-30 16:13:57 +02:00 |
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Aliaksandr Valialkin
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7a46af3920
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victorialogs: add cluster mode
Cluster mode is enabled when -storageNode command-line flag is passed to VictoriaLogs.
In this mode it spreads the ingested logs among storage nodes specified in the -storageNode flag.
It also queries storage nodes during `select` queries.
Cluster mode allows building multi-level cluster setup when top-level select node can query multiple lower-level clusters
and get global querying view.
See https://docs.victoriametrics.com/victorialogs/cluster/
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/5077
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/7950
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/8223
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2025-04-10 16:55:23 +02:00 |
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