HBASE-21721 reduce write#syncs() times

[cuibo01]

No description provided.

[Apache-HBase]

🎊 +1 overall

Vote	Subsystem	Runtime	Comment
+0 🆗	reexec	1m 3s	Docker mode activated.
		_ Prechecks _
+1 💚	dupname	0m 0s	No case conflicting files found.
+1 💚	hbaseanti	0m 0s	Patch does not have any anti-patterns.
+1 💚	@author	0m 0s	The patch does not contain any @author tags.
-0 ⚠️	test4tests	0m 0s	The patch doesn't appear to include any new or modified tests. Please justify why no new tests are needed for this patch. Also please list what manual steps were performed to verify this patch.
		_ branch-1 Compile Tests _
+1 💚	mvninstall	9m 35s	branch-1 passed
+1 💚	compile	0m 37s	branch-1 passed with JDK v1.8.0_262
+1 💚	compile	0m 41s	branch-1 passed with JDK v1.7.0_272
+1 💚	checkstyle	1m 39s	branch-1 passed
+1 💚	shadedjars	2m 57s	branch has no errors when building our shaded downstream artifacts.
+1 💚	javadoc	0m 46s	branch-1 passed with JDK v1.8.0_262
+1 💚	javadoc	0m 39s	branch-1 passed with JDK v1.7.0_272
+0 🆗	spotbugs	2m 56s	Used deprecated FindBugs config; considering switching to SpotBugs.
+1 💚	findbugs	2m 52s	branch-1 passed
		_ Patch Compile Tests _
+1 💚	mvninstall	1m 55s	the patch passed
+1 💚	compile	0m 38s	the patch passed with JDK v1.8.0_262
+1 💚	javac	0m 38s	the patch passed
+1 💚	compile	0m 42s	the patch passed with JDK v1.7.0_272
+1 💚	javac	0m 42s	the patch passed
+1 💚	checkstyle	1m 30s	the patch passed
+1 💚	whitespace	0m 0s	The patch has no whitespace issues.
+1 💚	shadedjars	2m 49s	patch has no errors when building our shaded downstream artifacts.
+1 💚	hadoopcheck	4m 33s	Patch does not cause any errors with Hadoop 2.8.5 2.9.2.
+1 💚	javadoc	0m 30s	the patch passed with JDK v1.8.0_262
+1 💚	javadoc	0m 39s	the patch passed with JDK v1.7.0_272
+1 💚	findbugs	2m 49s	the patch passed
		_ Other Tests _
+1 💚	unit	127m 7s	hbase-server in the patch passed.
+1 💚	asflicense	0m 26s	The patch does not generate ASF License warnings.
		167m 33s

Subsystem	Report/Notes
Docker	Client=19.03.12 Server=19.03.12 base: https://ci-hadoop.apache.org/job/HBase/job/HBase-PreCommit-GitHub-PR/job/PR-2220/1/artifact/out/Dockerfile
GITHUB PR	#2220
Optional Tests	dupname asflicense javac javadoc unit spotbugs findbugs shadedjars hadoopcheck hbaseanti checkstyle compile
uname	Linux 4d1426985ebd 4.15.0-112-generic #113-Ubuntu SMP Thu Jul 9 23:41:39 UTC 2020 x86_64 x86_64 x86_64 GNU/Linux
Build tool	maven
Personality	/home/jenkins/jenkins-home/workspace/Base-PreCommit-GitHub-PR_PR-2220/out/precommit/personality/provided.sh
git revision	branch-1 / 839ce8e
Default Java	1.7.0_272
Multi-JDK versions	/usr/lib/jvm/zulu-8-amd64:1.8.0_262 /usr/lib/jvm/zulu-7-amd64:1.7.0_272
Test Results	https://ci-hadoop.apache.org/job/HBase/job/HBase-PreCommit-GitHub-PR/job/PR-2220/1/testReport/
Max. process+thread count	4139 (vs. ulimit of 10000)
modules	C: hbase-server U: hbase-server
Console output	https://ci-hadoop.apache.org/job/HBase/job/HBase-PreCommit-GitHub-PR/job/PR-2220/1/console
versions	git=1.9.1 maven=3.0.5 findbugs=3.0.1
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