Aliaksandr Valialkin
0ec44497ea
docs/CHANGELOG.md: run at least 4 background mergers on systems with less than 4 CPU cores
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This reduces the probability of sudden spike in the number of small parts when all the background mergers
are busy with big merges.
2023-04-13 23:39:02 -07:00
Aliaksandr Valialkin
e7c20f0c75
lib/{mergeset,storage}: prevent from long wait time when creating a snapshot under high data ingestion rate
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Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/3551
Updates https://github.com/VictoriaMetrics/VictoriaMetrics/pull/3873
2023-03-24 22:12:08 -07:00
Nikolay
ce950d3b06
lib{mergset,storage}: prevent possible race condition with logging st… ( #3900 )
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lib{mergset,storage}: prevent possible race condition with logging stats for merges
Previously partwrapper could be release by background process and reference for part may be invalid
during logging stats. It will lead to panic at vmstorage
https://github.com/VictoriaMetrics/VictoriaMetrics/issues/3897
2023-03-12 01:23:55 -08:00
Zakhar Bessarab
c9547f4fba
lib/{fs,mergeset,storage}: skip .must-remove. dirs when creating snapshot ( #3858 ) ( #3867 )
2023-02-24 12:44:35 -08:00
Aliaksandr Valialkin
ddd8d01cf5
lib/{mergeset,storage}: allow at least 3 concurrent flushes during background merges on systems with 1 or 2 CPU cores
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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 12:17:46 -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
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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
