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https://issues.apache.org/jira/browse/HBASE-17128?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15680091#comment-15680091
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stack commented on HBASE-17128:
-------------------------------
Thanks [~gbaecher]. Hopefully by the time you are back I will have reproduced
your finding and found cause.
> Find Cause of a Write Perf Regression in branch-1.2
> ---------------------------------------------------
>
> Key: HBASE-17128
> URL: https://issues.apache.org/jira/browse/HBASE-17128
> Project: HBase
> Issue Type: Task
> Reporter: stack
>
> As reported by [~gbaecher] up on the mailing list, there is a regression in
> 1.2. The regression is in a CDH version of 1.2 actually but the CDH hbase is
> a near pure 1.2. This is a working issue to figure which of the below changes
> brought on slower writes (The list comes from doing the following...git log
> --oneline
> remotes/origin/cdh5-1.2.0_5.8.0_dev..remotes/origin/cdh5-1.2.0_5.9.0_dev ...
> I stripped the few CDH specific changes, packaging and tagging only, and then
> made two groupings; candidates and the unlikelies):
> {code}
> 1 bbc6762 HBASE-16023 Fastpath for the FIFO rpcscheduler Adds an executor
> that does balanced queue and fast path handing off requests directly to
> waiting handlers if any present. Idea taken from Apace Kudu (incubating). See
> https://gerr#
> 2 a260917 HBASE-16288 HFile intermediate block level indexes might recurse
> forever creating multi TB files
> 3 5633281 HBASE-15811 Batch Get after batch Put does not fetch all Cells We
> were not waiting on all executors in a batch to complete. The test for
> no-more-executors was damaged by the 0.99/0.98.4 fix "HBASE-11403 Fix race
> conditions aro#
> 4 780f720 HBASE-11625 - Verifies data before building HFileBlock. - Adds
> HFileBlock.Header class which contains information about location of fields.
> Testing: Adds CorruptedFSReaderImpl to TestChecksum. (Apekshit)
> 5 d735680 HBASE-12133 Add FastLongHistogram for metric computation (Yi Deng)
> 6 c4ee832 HBASE-15222 Use less contended classes for metrics
> 7
> 8 17320a4 HBASE-15683 Min latency in latency histograms are emitted as
> Long.MAX_VALUE
> 9 283b39f HBASE-15396 Enhance mapreduce.TableSplit to add encoded region
> name
> 10 39db592 HBASE-16195 Should not add chunk into chunkQueue if not using
> chunk pool in HeapMemStoreLAB
> 11 5ff28b7 HBASE-16194 Should count in MSLAB chunk allocation into heap size
> change when adding duplicate cells
> 12 5e3e0d2 HBASE-16318 fail build while rendering velocity template if
> dependency license isn't in whitelist.
> 13 3ed66e3 HBASE-16318 consistently use the correct name for 'Apache
> License, Version 2.0'
> 14 351832d HBASE-16340 exclude Xerces iplementation jars from coming in
> transitively.
> 15 b6aa4be HBASE-16321 ensure no findbugs-jsr305
> 16 4f9dde7 HBASE-16317 revert all ESAPI changes
> 17 71b6a8a HBASE-16284 Unauthorized client can shutdown the cluster (Deokwoo
> Han)
> 18 523753f HBASE-16450 Shell tool to dump replication queues
> 19 ca5f2ee HBASE-16379 [replication] Minor improvement to
> replication/copy_tables_desc.rb
> 20 effd105 HBASE-16135 PeerClusterZnode under rs of removed peer may never
> be deleted
> 21 a5c6610 HBASE-16319 Fix TestCacheOnWrite after HBASE-16288
> 22 1956bb0 HBASE-15808 Reduce potential bulk load intermediate space usage
> and waste
> 23 031c54e HBASE-16096 Backport. Cleanly remove replication peers from
> ZooKeeper.
> 24 60a3b12 HBASE-14963 Remove use of Guava Stopwatch from HBase client code
> (Devaraj Das)
> 25 c7724fc HBASE-16207 can't restore snapshot without "Admin" permission
> 26 8322a0b HBASE-16227 [Shell] Column value formatter not working in scans.
> Tested : manually using shell.
> 27 8f86658 HBASE-14818 user_permission does not list namespace permissions
> (li xiang)
> 28 775cd21 HBASE-15465 userPermission returned by getUserPermission() for
> the selected namespace does not have namespace set (li xiang)
> 29 8d85aff HBASE-16093 Fix splits failed before creating daughter regions
> leave meta inconsistent
> 30 bc41317 HBASE-16140 bump owasp.esapi from 2.1.0 to 2.1.0.1
> 31 6fc70cd HBASE-16035 Nested AutoCloseables might not all get closed (Sean
> Mackrory)
> 32 fe28fe84 HBASE-15891. Closeable resources potentially not getting closed
> if exception is thrown.
> 33 1d2bf3c HBASE-14644 Region in transition metric is broken -- addendum
> (Huaxiang Sun)
> 34 fd5f56c HBASE-16056 Procedure v2 - fix master crash for FileNotFound
> 35 10cd038 HBASE-16034 Fix ProcedureTestingUtility#LoadCounter.setMaxProcId()
> 36 dae4db4 HBASE-15872 Split TestWALProcedureStore
> 37 e638d86 HBASE-14644 Region in transition metric is broken (Huaxiang Sun)
> 38 f01b01d HBASE-15496 Throw RowTooBigException only for user scan/get
> (Guanghao Zhang)
> 39 cc0ce66 HBASE-15746 Remove extra RegionCoprocessor preClose() in
> RSRpcServices#closeRegion (Stephen Yuan Jiang)
> 40 923f6d7 HBASE-15873 ACL for snapshot restore / clone is not enforced
> 41 62df392 HBASE-15946. Eliminate possible security concerns in Store File
> metrics.
> 42 293db90 HBASE-15925 provide default values for hadoop compat module
> related properties that match default hadoop profile.
> 43 b1b5b66 HBASE-15889. String case conversions are locale-sensitive, used
> without locale
> 44 4a8c4e7 HBASE-15698 Increment TimeRange not serialized to server (Ted Yu)
> 45 81c7620 HBASE-15663 Hook up JvmPauseMonitor to ThriftServer
> 46 0d75f5b HBASE-15662 Hook up JvmPauseMonitor to REST server
> 47 c099b61 HBASE-15614 Report metrics from JvmPauseMonitor
> 48 46b1efe HBASE-15621 Suppress Hbase SnapshotHFile cleaner error messages
> when a snaphot is going on (Huaxiang Sun)
> 49 26cfccf HBASE-15236 Addendum to fix test failures.
> 50 b786db3 HBASE-15622 Superusers does not consider the keytab credentials
> {code}
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