Aliaksandr Valialkin
1b16118e17
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 14:39:24 -08:00
Aliaksandr Valialkin
0d41d933e9
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 09:13:49 -08:00
Aliaksandr Valialkin
d1af6046c7
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 17:00:50 -08:00
Aliaksandr Valialkin
d99d222f0a
lib/{storage,mergeset}: log the duration for flushing in-memory parts on graceful shutdown
2022-12-05 21:30:48 -08:00
Aliaksandr Valialkin
8189770c50
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 15:16:14 -08:00
Aliaksandr Valialkin
544ea89f91
lib/{mergeset,storage}: add start background workers via startBackgroundWorkers() function
2022-12-04 00:01:04 -08:00
Aliaksandr Valialkin
33dda2809b
lib/mergeset: panic when too long item is passed to Table.AddItems()
2022-12-03 23:32:16 -08:00
Aliaksandr Valialkin
cb44976716
lib/{storage,mergeset}: use a single sync.WaitGroup for all background workers
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This simplifies the code
2022-12-03 23:03:08 -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
6d87462f4b
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 22:34:54 -08:00
Aliaksandr Valialkin
f3e3a3daeb
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 22:30:36 -08:00
Aliaksandr Valialkin
c4150995ad
lib/mergeset: reduce the time needed for the slowest tests
2022-12-03 22:26:33 -08:00
Aliaksandr Valialkin
45299efe22
lib/{storage,mergeset}: consistency rename: `flushRaw{Rows,Items} -> flushPending{Rows,Items}
2022-12-03 22:17:46 -08:00
Aliaksandr Valialkin
ddc3d6b5c3
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 21:17:31 -08:00
Aliaksandr Valialkin
e9636b4c69
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 18:52:37 -08:00
Aliaksandr Valialkin
a75137c1c2
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 21:23:35 +02:00
Aliaksandr Valialkin
4106f197f2
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 12:09:23 +02:00
Aliaksandr Valialkin
58b40f514c
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
2022-11-15 16:30:54 +02:00
Aliaksandr Valialkin
c4265322f4
lib/fs: add canOverwrite arg to WriteFileAtomically when it is allowed to overwrite the file atomically if it already exists
2022-10-26 01:07:34 +03:00
Aliaksandr Valialkin
fd7c86ae25
lib/{mergeset,storage}: simplify the code a bit after ae55ad8749
2022-10-21 14:33:03 +03:00
Aliaksandr Valialkin
150e99d403
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 16:25:43 +03:00
Aliaksandr Valialkin
ae55ad8749
lib/{storage,mergeset}: do not hold per-shard lock in fast path when adding per-shard items to the flush list
2022-10-17 18:01:26 +03:00
Aliaksandr Valialkin
185cff307b
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 09:54:21 +03:00
Roman Khavronenko
e96ccf3f71
lib/mergeset: follow-up after a0e7432e42 ( #3145 )
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* lib/mergeset: follow-up after a0e7432e42
2022-09-26 16:39:56 +03:00
Aliaksandr Valialkin
ce2c07c5a7
lib/mergeset: atomically remove part dirs
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Updates https://github.com/VictoriaMetrics/VictoriaMetrics/issues/3038
2022-09-13 16:17:38 +03:00
Aliaksandr Valialkin
1f89278d88
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 00:16:37 +03:00
Aliaksandr Valialkin
9f94c295ab
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 23:52:35 +03:00
Aliaksandr Valialkin
d5df08e9c2
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 18:23:01 +03:00
Aliaksandr Valialkin
de6dd1cd5a
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
2022-07-27 23:58:05 +03:00
Aliaksandr Valialkin
a3f5822dc2
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()
2022-07-27 23:05:02 +03:00
Aliaksandr Valialkin
be1c82beb1
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 22:20:27 +03:00
Aliaksandr Valialkin
5c84f09762
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 21:24:51 +03:00
zhenyuxie
f3ea7823f3
fix inmemoryBlock's Less method ( #2881 )
2022-07-18 11:56:17 +03:00
Dmytro Kozlov
306ec10c39
lib/mergeset: fix linter error ( #2864 )
2022-07-13 12:31:35 +03:00
Aliaksandr Valialkin
17b5ac1608
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 12:50:26 +03:00
Loki's Wager
ac411be904
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 15:56:41 +03:00
Aliaksandr Valialkin
ea06d2fd3c
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 14:36:45 +03:00
Aliaksandr Valialkin
98129d4a8e
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 13:18:39 +03:00
Aliaksandr Valialkin
a96eb16329
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 15:23:00 +03:00
Aliaksandr Valialkin
7bad7133bc
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 19:35:55 +03:00
Aliaksandr Valialkin
ad35068c3a
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 18:51:36 +03:00
Aliaksandr Valialkin
0a4aadffac
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 17:08:44 +02:00
Aliaksandr Valialkin
c84a8b34cc
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 16:46:37 +02:00
Aliaksandr Valialkin
7da4068f48
lib/mergeset: consistency renaming: ip->mp for inmemoryPart vars
2022-03-03 15:48:22 +02:00
Aliaksandr Valialkin
e8fdb27625
lib/mergeset: move storageBlock from inmemoryPart to a sync.Pool
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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 15:44:02 +02:00
Aliaksandr Valialkin
59877d9f32
lib/{mergeset,storage}: tune compression levels for small blocks
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This should reduce CPU usage spent on compression
2022-02-25 15:33:40 +02:00
Aliaksandr Valialkin
af5bdb9254
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 11:20:32 +02:00
Aliaksandr Valialkin
ed12c60826
lib/mergeset: typo fix after b6ed9afd6d
2022-02-21 17:58:22 +02:00
Roman Khavronenko
b6ed9afd6d
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 13:50:34 +02:00
Aliaksandr Valialkin
f9a17cb5fe
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 19:09:46 +02:00
