Oleksandr Redko
0e1c395609
app,lib: fix typos in comments ( #3804 )
2023-02-13 09:32:35 -08:00
Aliaksandr Valialkin
9053745a6f
lib/{mergeset,storage}: allow at least 3 concurrent flushes during background merges on systems with 1 or 2 CPU cores
...
This should prevent from data ingestion slowdown and query performance degradation
on systems with small number of CPU cores (1 or 2), when big merge is performed.
This should help https://github.com/VictoriaMetrics/VictoriaMetrics/issues/3790
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/3337
2023-02-11 12:09:13 -08:00
Aliaksandr Valialkin
4c7062b408
lib/mergeset: use deterministic random generator in tests
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Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/3683
2023-01-23 19:44:10 -08:00
Aliaksandr Valialkin
f8dcbe4abd
lib/mergeset: fix data race in BenchmarkInmemoryBlockMarshal
2023-01-23 19:44:07 -08:00
Aliaksandr Valialkin
c5e858461c
lib/{storage,mergeset}: wake up background merges as soon as there is a potential work for them
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Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/3647
2023-01-18 01:10:43 -08:00
Aliaksandr Valialkin
70b5a6fb28
lib/{storage,mergeset}: do not run assisted merges when flushing pending samples to parts
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Assisted merges are intended to be performed by goroutines, which accept the incoming samples,
in order to limit the data ingestion rate.
The worker, which converts pending samples to parts, shouldn't be penalized by assisted merges,
since this may result in increased number of pending rows as seen at https://github.com/VictoriaMetrics/VictoriaMetrics/issues/3647#issuecomment-1385039142
when the assisted merge takes too much time.
2023-01-18 00:25:33 -08:00
Aliaksandr Valialkin
103dfd0525
lib/{mergeset,storage}: do not slow down concurrently executed queries during assisted merges
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Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/3647
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/3641
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/648
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/291
2023-01-16 14:45:40 -08:00
Roman Khavronenko
57277ed6bc
vmstorage: add more context to the flock acquiring msg ( #3584 )
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See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/3578
Signed-off-by: hagen1778 <roman@victoriametrics.com>
Signed-off-by: hagen1778 <roman@victoriametrics.com>
2023-01-05 18:32:53 -08:00
Aliaksandr Valialkin
8dc04a86f6
lib/{storage,mergeset}: tune the threshold for assisted merge
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The https://github.com/VictoriaMetrics/VictoriaMetrics/issues/3425#issuecomment-1359117221
reveals that CPU usage for incoming queries may significantly increase when the number
of in-memory parts becomes too big.
This commit reduces the maximum number of in-memory parts before starting the assisted merge
during data ingestion. This should reduce CPU usage for incoming queries,
since they need to inspect lower number of in-memory parts.
This should help https://github.com/VictoriaMetrics/VictoriaMetrics/issues/3425
2022-12-28 14:42:45 -08:00
Aliaksandr Valialkin
ea7940e5a7
lib/mergeset: reduce the parts threshold before starting assisted merges
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This should improve query speed in general case.
This is a follow-up for d1af6046c7
2022-12-13 09:14:08 -08:00
Aliaksandr Valialkin
2a190f6451
lib/{mergeset,storage}: do not block small merges by pending big merges - assist with small merges instead
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Blocked small merges may result into big number of small parts, which, in turn,
may result in increased CPU and memory usage during queries, since queries need to inspect
all the existing small parts.
The issue has been introduced in 8189770c50https://github.com/VictoriaMetrics/VictoriaMetrics/issues/3337
2022-12-12 17:01:33 -08:00
Aliaksandr Valialkin
0a9992a9c6
lib/{storage,mergeset}: log the duration for flushing in-memory parts on graceful shutdown
2022-12-05 21:55:21 -08:00
Aliaksandr Valialkin
7d5c64eb7a
all: add -inmemoryDataFlushInterval command-line flag for controlling the frequency of saving in-memory data to disk
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The main purpose of this command-line flag is to increase the lifetime of low-end flash storage
with the limited number of write operations it can perform. Such flash storage is usually
installed on Raspberry PI or similar appliances.
For example, `-inmemoryDataFlushInterval=1h` reduces the frequency of disk write operations
to up to once per hour if the ingested one-hour worth of data fits the limit for in-memory data.
The in-memory data is searchable in the same way as the data stored on disk.
VictoriaMetrics automatically flushes the in-memory data to disk on graceful shutdown via SIGINT signal.
The in-memory data is lost on unclean shutdown (hardware power loss, OOM crash, SIGKILL).
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/3337
2022-12-05 15:28:09 -08:00
Aliaksandr Valialkin
9ac1174493
lib/{mergeset,storage}: add start background workers via startBackgroundWorkers() function
2022-12-04 00:01:14 -08:00
Aliaksandr Valialkin
a13d21513e
lib/mergeset: panic when too long item is passed to Table.AddItems()
2022-12-03 23:37:20 -08:00
Aliaksandr Valialkin
bb93494eac
lib/{storage,mergeset}: use a single sync.WaitGroup for all background workers
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This simplifies the code
2022-12-03 23:03:32 -08:00
Aliaksandr Valialkin
ea55c16422
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 22:47:06 -08:00
Aliaksandr Valialkin
eca7f32151
lib/mergeset: use the given compressLevel for index and metaindex compression in in-memory part
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Previously only data was compressed with the given compressLevel
2022-12-03 22:35:16 -08:00
Aliaksandr Valialkin
7ffa66d249
lib/{mergeset,storage}: take into account byte slice capacity when returning the size of in-memory part
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This results in more correct reporting of memory usage for in-memory parts
2022-12-03 22:31:34 -08:00
Aliaksandr Valialkin
886ce94739
lib/mergeset: reduce the time needed for the slowest tests
2022-12-03 22:26:46 -08:00
Aliaksandr Valialkin
10a17bfa16
lib/{storage,mergeset}: consistency rename: `flushRaw{Rows,Items} -> flushPending{Rows,Items}
2022-12-03 22:18:05 -08:00
Aliaksandr Valialkin
0b8e7deabd
lib/mergeset: drop the crufty code responsible for direct upgrade from releases prior v1.28.0
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Upgrade to v1.84.0, wait until the "finished round 2 of background conversion" message
appears in the log and then upgrade to newer release.
2022-12-03 21:18:41 -08:00
Aliaksandr Valialkin
d8d4d21d7a
lib/{mergeset,storage}: re-use the code for removing isInMerge flag at parts
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Move the common code into releasePartsToMerge() method and consistently use it throughout the code.
2022-12-02 17:07:52 -08:00
Aliaksandr Valialkin
b0b8f05fa4
lib/mergeset: properly reset bsr.bhIdx after the call to blockStreamReader.readNextBHS()
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The issue has been introduced in 58b40f514chttps://github.com/VictoriaMetrics/VictoriaMetrics/issues/3343
2022-11-16 21:22:51 +02:00
Aliaksandr Valialkin
06300fe9b8
lib/mergeset: retain the buffer with the data used by indexBlock.bhs, inside indexBlock.buf
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Previously indexBlock.bhs pointed to the buffer, which could be changed over time.
This could result in incorrect time series search over time.
This is a follow-up for 58b40f514chttps://github.com/VictoriaMetrics/VictoriaMetrics/issues/3343
2022-11-16 12:10:15 +02:00
Aliaksandr Valialkin
454060fd78
lib/mergeset: remove string allocation and copying when unmarshaling blockHeader
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This should reduce CPU usage for the case from https://github.com/VictoriaMetrics/VictoriaMetrics/issues/3343
2022-11-16 12:10:14 +02:00
Aliaksandr Valialkin
ecb71a7221
lib/fs: add canOverwrite arg to WriteFileAtomically when it is allowed to overwrite the file atomically if it already exists
2022-10-26 01:08:35 +03:00
Aliaksandr Valialkin
1fb2be0cae
lib/{mergeset,storage}: simplify the code a bit after ae55ad8749
2022-10-21 14:33:15 +03:00
Aliaksandr Valialkin
6855de311c
lib/{mergeset,storage}: avoid unaligned 64-bit atomic operation panic on 32-bit platforms
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The panic has been introduced in 68f3a02589
2022-10-20 16:24:46 +03:00
Aliaksandr Valialkin
68f3a02589
lib/{storage,mergeset}: do not hold per-shard lock in fast path when adding per-shard items to the flush list
2022-10-17 18:01:55 +03:00
Aliaksandr Valialkin
7a6e5f9224
lib/mergeset: mention in the error message the path to the part, which triggered the error
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This should improve debuggability
2022-10-12 09:54:42 +03:00
Roman Khavronenko
fe71c73fe1
lib/mergeset: follow-up after a0e7432e42 ( #3145 )
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* lib/mergeset: follow-up after a0e7432e42
2022-09-26 16:43:17 +03:00
Aliaksandr Valialkin
5b488a339d
lib/mergeset: atomically remove part dirs
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Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/3038
2022-09-13 15:56:33 +03:00
Aliaksandr Valialkin
1905618d10
all: subsitute ioutil.ReadAll with io.ReadAll
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ioutil.ReadAll is deprecated since Go1.16 - see https://tip.golang.org/doc/go1.16#ioutil
VictoriaMetrics requires at least Go1.18, so it is OK to switch from ioutil.ReadAll to io.ReadAll.
This is a follow-up for 02ca2342ab
2022-08-22 00:16:04 +03:00
Aliaksandr Valialkin
06f6de6d47
all: use os.{Read|Write}File instead of ioutil.{Read|Write}File
...
The ioutil.{Read|Write}File is deprecated since Go1.16 -
see https://tip.golang.org/doc/go1.16#ioutil
VictoriaMetrics needs at least Go1.18, so it is safe to remove ioutil usage
from source code.
This is a follow-up for 02ca2342ab
2022-08-21 23:55:20 +03:00
Aliaksandr Valialkin
db049fed84
lib/mergeset: cleanup after de6dd1cd5a
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Remove unused getInmemoryPart and putInmemoryPart functions
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/2249
2022-08-04 18:34:38 +03:00
Aliaksandr Valialkin
962ed46583
lib/mergeset: optimize mergeInmemoryBlocks() function
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Do not spend CPU time on converting inmemoryBlock structs to inmemoryPart structs.
Just merge inmemoryBlock structs directly.
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/2249
2022-07-28 00:05:45 +03:00
Aliaksandr Valialkin
3bbe9054d3
lib/mergeset: do not update blockStreamReader.bh.firstItem during the merge
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Just read the current item directly from blockStreamReader.Block.Items
with the helper method - blockStreamReader.CurrItem()
2022-07-28 00:05:43 +03:00
Aliaksandr Valialkin
547cb1edce
benchmark inmemoryBlock.{Marshal,Unmarshal} for different prefix length
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Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/2254
This is needed for https://github.com/VictoriaMetrics/VictoriaMetrics/pull/2913
2022-07-27 22:19:26 +03:00
Aliaksandr Valialkin
5f2b5bd173
lib/mergeset: add tests and benchmarks for commonPrefixLen function
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Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/2254
This is needed for https://github.com/VictoriaMetrics/VictoriaMetrics/pull/2913
2022-07-27 21:25:23 +03:00
zhenyuxie
14c6212a61
fix inmemoryBlock's Less method ( #2881 )
2022-07-18 12:00:45 +03:00
Dmytro Kozlov
5256af2291
lib/mergeset: fix linter error ( #2864 )
2022-07-13 12:34:28 +03:00
Aliaksandr Valialkin
7cbcbea49d
lib/mergeset: optimize merge speed a bit
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Use heap.Fix instead of heap.Pop + heap.Push when merging blocks
2022-07-12 12:52:36 +03:00
Loki's Wager
ca4730c00f
BugFix part_header.go ( #2763 )
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https://github.com/VictoriaMetrics/VictoriaMetrics/issues/2757
Co-authored-by: haotingyi <haotingyi@corp.netease.com>
2022-06-21 15:59:11 +03:00
Aliaksandr Valialkin
fedfc9e686
lib/storage: stop background merge when storage enters read-only mode
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This should prevent from `no space left on device` errors when VictoriaMetrics
under-estimates the additional disk space needed for background merge.
See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/2603
2022-06-01 14:22:12 +03:00
Aliaksandr Valialkin
ed1b394a1a
app/vmstorage: expose vm_indexdb_items_added_total and vm_indexdb_items_added_size_bytes_total counters at /metrics page
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These counters can be used for monitoring the rate of addition of new entries in indexdb (aka inverted index).
See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/2471
2022-04-21 13:19:42 +03:00
Aliaksandr Valialkin
edb139cfe4
lib/memory: export process_memory_limit_bytes metric, which shows the amounts of memory the current process has access to
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This metric is equivalent to `vm_available_memory_bytes`, but it has better name,
since the metric is related to a process, not VictoriaMetrics itself.
Leave `vm_available_memory_bytes` for backwards compatibility.
2022-04-07 15:24:08 +03:00
Aliaksandr Valialkin
8ef9348801
lib/mergeset: use more rawItemsShard shards on multi-CPU systems
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This should improve the scalability for registering of new time series on multi-CPU system
2022-04-06 19:50:41 +03:00
Aliaksandr Valialkin
db00ddd23e
lib/mergeset: skip common prefixes when comparing inmemoryBlock items
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This should improve the performance for items sorting inside inmemoryBlock.MarshalUnsortedData
if they have common prefix.
While at it, improve the performance for inmemoryBlock.updateCommonPrefix for sorted items.
This should improve performance for inmemoryBlock.MarshalSortedData during background merge.
2022-04-06 18:55:25 +03:00
Aliaksandr Valialkin
3f999b11f7
lib/mergeset: remove aux buffers from inmemoryPart
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This should reduce the size of inmemoryPart items and may improve performance a bit during registering new time series
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/2247
2022-03-03 17:12:25 +02:00
Aliaksandr Valialkin
ecf68da79e
lib/mergeset: eliminate copying of itemsData and lensData from storageBlock to inmemoryBlock
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This should improve performance when registering new time series.
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/2247
2022-03-03 17:12:25 +02:00
Aliaksandr Valialkin
ecf4f7bf21
lib/mergeset: consistency renaming: ip->mp for inmemoryPart vars
2022-03-03 17:12:25 +02:00
Aliaksandr Valialkin
f4e466955d
lib/mergeset: move storageBlock from inmemoryPart to a sync.Pool
...
The lifetime of storageBlock is much shorter comparing to the lifetime of inmemoryPart,
so sync.Pool usage should reduce overall memory usage and improve performance
because of better locality of reference when marshaling inmemoryBlock to inmemoryPart.
https://github.com/VictoriaMetrics/VictoriaMetrics/issues/2247
2022-03-03 17:12:25 +02:00
Aliaksandr Valialkin
b47f18f555
lib/{mergeset,storage}: tune compression levels for small blocks
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This should reduce CPU usage spent on compression
2022-02-25 15:34:13 +02:00
Aliaksandr Valialkin
1967b9c211
lib/mergeset: remove superflouos sorting of inmemoryBlock.data at inmemoryBlock.sort()
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There is no need to sort the underlying data according to sorted items there.
This should reduce cpu usage when registering new time series in `indexdb`.
Thanks to @ahfuzhang for the suggestion at https://github.com/VictoriaMetrics/VictoriaMetrics/issues/2245
2022-02-24 11:19:44 +02:00
Aliaksandr Valialkin
986c12487a
lib/mergeset: typo fix after b6ed9afd6d
2022-02-21 19:00:04 +02:00
Roman Khavronenko
bd7837d524
lib: allow to configure cache size by type ( #2206 )
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* lib: allow to configure cache size by type
https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1940
Signed-off-by: hagen1778 <roman@victoriametrics.com>
* Apply suggestions from code review
* wip
Co-authored-by: Aliaksandr Valialkin <valyala@victoriametrics.com>
2022-02-21 13:55:51 +02:00
Aliaksandr Valialkin
895c9f4f11
lib/mergeset: tune indexdb/{indexBlocks,dataBlocks} cache sizes further according to production stats
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Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/2007
2022-02-10 19:11:13 +02:00
Aliaksandr Valialkin
a0a56d6c1c
lib/mergeset: tune sizes for indexdb/dataBlocks and indexdb/indexBlocks according to production workload
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This should help with https://github.com/VictoriaMetrics/VictoriaMetrics/issues/2007#issuecomment-1032308742
2022-02-08 18:04:03 +02:00
Aliaksandr Valialkin
d8d59ff760
lib/mergeset: pre-allocate data and items for inmemoryBlock in order to reduce memory allocations under high churn rate
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Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/2007
2022-02-01 11:20:20 +02:00
Aliaksandr Valialkin
02b2bfcff3
lib/bytesutil: split Resize* funcs to MayOverallocate and NoOverallocate for more fine-grained control over memory allocations
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Follow-up for f4989edd96https://github.com/VictoriaMetrics/VictoriaMetrics/issues/2007
2022-02-01 11:20:20 +02:00
匠心零度
a1083d0531
optimized code ( #2103 )
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* optimized code ,because only the first error,so no need var errors []error
* optimized code ,because only the first error,so no need var errors []error
Co-authored-by: lirenzuo <lirenzuo@shein.com>
2022-01-28 12:10:47 +02:00
Aliaksandr Valialkin
6232eaa938
lib/bytesutil: split Resize() into ResizeNoCopy() and ResizeWithCopy() functions
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Previously bytesutil.Resize() was copying the original byte slice contents to a newly allocated slice.
This wasted CPU cycles and memory bandwidth in some places, where the original slice contents wasn't needed
after slize resizing. Switch such places to bytesutil.ResizeNoCopy().
Rename the original bytesutil.Resize() function to bytesutil.ResizeWithCopy() for the sake of improved readability.
Additionally, allocate new slice with `make()` instead of `append()`. This guarantees that the capacity of the allocated slice
exactly matches the requested size. The `append()` could return a slice with bigger capacity as an optimization for further `append()` calls.
This could result in excess memory usage when the returned byte slice was cached (for instance, in lib/blockcache).
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/2007
2022-01-25 15:28:42 +02:00
Aliaksandr Valialkin
7ec0705b98
lib/mergeset: allocate the needed amounts of memory when unmarshaling inmemoryBlock
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This should reduce the memory required for indexdb/dataBlocks cache.
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/2007
2022-01-24 18:52:22 +02:00
Aliaksandr Valialkin
9edf407144
lib/mergeset: tune caches size limits for indexdb/dataBlocks and indexdb/indexBlocks
...
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/2007
2022-01-21 12:46:05 +02:00
Aliaksandr Valialkin
6ae584b9b3
lib/{mergeset,storage}: properly limit cache sizes for indexdb
...
Previously these caches could exceed limits set via `-memory.allowedPercent` and/or `-memory.allowedBytes`,
since limits were set independently per each data part. If the number of data parts was big, then limits could be exceeded,
which could result to out of memory errors.
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/2007
2022-01-20 18:45:03 +02:00
Aliaksandr Valialkin
ab4be24397
app/vmstorage: export vm_cache_size_max_bytes metrics for determining capacity of various caches
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The vm_cache_size_max_bytes metric can be used for determining caches which reach their capacity via the following query:
vm_cache_size_bytes / vm_cache_size_max_bytes > 0.9
2021-12-02 10:30:01 +02:00
Aliaksandr Valialkin
b885bd9b7d
lib/{mergeset,storage}: improve the detection of the needed free space for background merge
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This should prevent from possible out of disk space crashes during big merges.
See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1560
2021-08-25 10:01:09 +03:00
Aliaksandr Valialkin
51cd19d2e3
lib/storage: reset perKeyMisses stats less frequently
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This should reduce CPU usage for queries executed with intervals higher than 30 seconds
2021-07-12 14:34:54 +03:00
Aliaksandr Valialkin
41754e12f8
lib/mergeset: cache indexBlock items only on the second request
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This should reduce the indexdb/indexBlocks cache size, since it won't contain one-time-wonders items.
2021-07-07 15:24:37 +03:00
Aliaksandr Valialkin
9826f7c1be
lib/storage: do not cache inmemoryBlock entries requested only once (aka one-time-wonder items)
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This should reduce the cache size and memory usage for the indexdb/dataBlocks cache
2021-07-07 10:59:45 +03:00
Aliaksandr Valialkin
b805a675f3
lib/{mergeset,storage}: switch from sync.Pool to chan-based pool for inmemoryPart objects
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This should reduce memory usage on systems with big number of CPU cores,
since every inmemoryPart object occupies at least 64KB of memory and sync.Pool maintains
a separate pool inmemoryPart objects per each CPU core.
Though the new scheme for the pool worsens per-cpu cache locality, this should be amortized
by big sizes of inmemoryPart objects.
2021-07-06 16:33:25 +03:00
Aliaksandr Valialkin
db6bd69475
lib/mergeset: increase pool capacity for inmemoryBlock according to collected profiles from production workload
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CPU and memory profiles show that the pool capacity for inmemoryBlock objects is too small.
This results in the increased load on memory allocation code in Go runtime.
Increase the pool capacity in order to reduce the load on Go runtime.
2021-07-06 13:44:27 +03:00
Aliaksandr Valialkin
fd32855a6c
lib/mergeset: limit the frequency for flushCallback calls to once per 10 seconds
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This should improve hit ratio for tagFiltersCache when big number of new time series are constantly registered
(aka high churn rate). This, in turn, should reduce CPU usage for queries over such time series.
2021-07-06 12:20:15 +03:00
Aliaksandr Valialkin
f12f97daa1
lib/{storage,mergeset}: increase cache timeout for data and index blocks from a minute to two minutes
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One minute cache timeout result in slower queries in some production workloads where the interval
between query execution is in the range 1 minute - 2 minutes.
2021-07-05 14:25:59 +03:00
Aliaksandr Valialkin
8055439fe4
lib/storage: properly detect free disk space shortage during data merge
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Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1373
2021-07-02 17:42:23 +03:00
Aliaksandr Valialkin
bced9ee666
lib/{mergeset,storage}: reduce the maximum lifetime for cached indexdb and data blocks from 2 minutes to a minute
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This should reduce memory usage on a system with high number of active time series and a high churn rate.
One minute is enough for caching the blocks needed for repeated queries (e.g. alerting rules, recording rules and dashboard refreshes).
2021-06-29 19:57:53 +03:00
Aliaksandr Valialkin
b7c0b3dde3
lib/mergeset: switch from sync.Pool to a channel for a pool for inmemoryBlock structs
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This should reduce memory usage for the pool on systems with big number of CPU cores.
The sync.Pool maintains per-CPU pools, so the total number of objects in the pool
is proportional to the number of available CPU cores. The channel limits the number
of pooled objects by its own capacity. This means smaller number of pooled objects on average.
2021-06-29 19:57:52 +03:00
Aliaksandr Valialkin
0efd37cec1
lib/{mergeset,storage}: reduce the number of fsync calls on data ingestion path on systems with many cpu cores
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VictoriaMetrics maintains a buffer per CPU core for the ingested data. These buffers are flushed to disk every second.
These buffers are flushed to disk in parallel starting from the commit 56b6b893cehttps://github.com/VictoriaMetrics/VictoriaMetrics/issues/1338#issuecomment-863046999 .
This commit merges the per-CPU buffers into bigger in-memory buffers before flushing them to disk.
This should reduce the rate of fsync syscalls and, consequently, the write disk IO on systems with many CPU cores.
This should help https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1338
See also https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1244
2021-06-17 13:51:42 +03:00
Aliaksandr Valialkin
6865f3b497
Revert "lib/mergeset: remove a pool for inmemoryBlock structs"
...
This reverts commit 793fe39921
2021-05-28 01:11:22 +03:00
Aliaksandr Valialkin
7b33bc67a1
lib/mergeset: remove a pool for inmemoryBlock structs
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The pool for inmemoryBlock struct doesn't give any performance gains in production workloads,
while it may result in excess memory usage for inmemoryBlock structs inside the pool during
background merge of indexdb.
2021-05-27 22:00:50 +03:00
Aliaksandr Valialkin
0fc857d363
lib/{mergeset,storage}: reduce the number of IFNO log messages like merged ... items across ... blocks in ... seconds
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Log these messages if the merge takes more than 30 seconds instead of 10 seconds.
2021-05-23 14:15:49 +03:00
Aliaksandr Valialkin
e37e1b1e34
lib/{storage,mergeset}: fix unaligned 64-bit atomic operation panic for 32-bit architectures
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The panic has been introduced in 56b6b893ce
2021-04-27 16:42:19 +03:00
Aliaksandr Valialkin
2d1d60118d
lib/mergeset: split rows ingestion among multiple shards
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This improves rows ingestion on systems with many CPU cores by reducing lock contention.
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1244
Thanks to @waldoweng for the original idea and draft implementation at https://github.com/VictoriaMetrics/VictoriaMetrics/pull/1243
2021-04-27 15:45:11 +03:00
Aliaksandr Valialkin
ab8008d6d7
lib/{storage,mergeset}: remove empty directories on startup. Such directories can be left after unclean shutdown on NFS storage
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Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/1142
2021-04-22 13:03:29 +03:00
Aliaksandr Valialkin
587132555f
lib/mergeset: reduce memory usage for inmemoryBlock by using more compact items representation
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This also should reduce CPU time spent by GC, since inmemoryBlock.items don't have pointers now,
so GC doesn't need visiting them.
2021-02-21 22:09:10 +02:00
Aliaksandr Valialkin
b8a5ee2e93
lib/{mergeset,storage}: allow merging smaller number of small parts
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While this may increase CPU and disk IO usage needed for background merge,
this also recudes CPU usage during queries in production. This is because
such queries tend to read recently added data and it is better to have lower number
of parts for such data in order to reduce CPU usage.
This partially reverts ebf8da3730
2021-02-21 21:43:37 +02:00
Aliaksandr Valialkin
34195218e1
lib/{mergeset,storage}: do not use pools for indexBlock and inmemoryBlock during their caching, since this results in higher memory usage in production without any performance gains
2021-02-21 21:43:37 +02:00
Aliaksandr Valialkin
9566015a36
Revert "lib/mergeset: tune lifetime for entries inside block caches"
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This reverts commit 458c89324d
2021-02-17 20:42:15 +02:00
Aliaksandr Valialkin
35a23234ca
lib/mergeset: tune lifetime for entries inside block caches
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This should reduce memory usage in general case without significant CPU usage increase
2021-02-16 18:12:32 +02:00
Aliaksandr Valialkin
500acb958c
lib/mergeset: clarify comments in the code a bit
2021-02-16 18:03:11 +02:00
Aliaksandr Valialkin
d788876a7a
lib/mergeset: remove unused code after a4140de9e6
2021-02-16 13:40:29 +02:00
Aliaksandr Valialkin
afa9cf9c57
lib/mergeset: remove dead code left after a4140de9e6
2021-02-09 16:51:09 +02:00
Aliaksandr Valialkin
7b7963a77f
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 00:49:59 +02:00
Aliaksandr Valialkin
e8ee9fa7fe
app/vmstorage: export missing vm_cache_size_bytes metrics for indexdb and data caches
2021-02-09 00:49:58 +02:00
faceair
cf76d8dd79
lib/mergeset: add missing shouldCacheBlock ( #1019 )
2021-01-15 11:47:25 +02:00
Aliaksandr Valialkin
edbe35509e
lib/{storage,mergeset}: tune background merge process in order to reduce CPU usage and disk IO usage
2020-12-18 20:01:20 +02:00
Aliaksandr Valialkin
1a237c6903
all: properly handle CPU limits set on the host system/container
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This can reduce memory usage on systems with enabled CPU limits.
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/946
2020-12-08 21:07:03 +02:00
Aliaksandr Valialkin
8f8727cb65
lib/mergeset: tune the number of rawItemsBlocks to merge at once
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512 blocks give higher ingestion performance and slightly lower memory usage
2020-11-25 21:53:15 +02:00
Aliaksandr Valialkin
8fcd87a6a5
lib/mergeset: help GC by removing refereces to slices in inmemoryBlock.Reset
2020-11-25 21:20:02 +02:00
