[jira] [Commented] (HBASE-1648) heap usage and limit reporting doesn't work as expected when using G1 GC
[ https://issues.apache.org/jira/browse/HBASE-1648?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=13508579#comment-13508579 ] liang xie commented on HBASE-1648: -- [~saint@gmail.com] yes, it should be safe. we should not use G1 before JDK7u4 And also, i tried in a hbase0.94.0 + jdk6u22 + G1GC test env(not a good choice, aha): hbase(main):003:0 status 'simple' 2 live servers ha3:60020 1354522267193 requestsPerSecond=0, numberOfOnlineRegions=1, usedHeapMB=38, maxHeapMB=200 ha2:60020 1354551060862 requestsPerSecond=0, numberOfOnlineRegions=6, usedHeapMB=88, maxHeapMB=200 0 dead servers Aggregate load: 0, regions: 7 the output is fine And, i tried with jdk7u9 + G1GC as well: hbase(main):002:0 status 'simple' 2 live servers ha2:60020 1354552532489 requestsPerSecond=0, numberOfOnlineRegions=5, usedHeapMB=46, maxHeapMB=200 ha3:60020 1354523738930 requestsPerSecond=0, numberOfOnlineRegions=2, usedHeapMB=44, maxHeapMB=200 0 dead servers Aggregate load: 0, regions: 7 still good heap usage and limit reporting doesn't work as expected when using G1 GC Key: HBASE-1648 URL: https://issues.apache.org/jira/browse/HBASE-1648 Project: HBase Issue Type: Bug Environment: Linux Centos x86_64 5.3, Sun JDK 1.6.0_14 (HotSpot 64-Bit Server VM build 14.0-b16) Reporter: Andrew Purtell Priority: Minor Getting some early experience with the G1 GC. Running with -Xmx1000m and HBASE_OPTS set to -XX:+UnlockExperimentalVMOpts -XX:+UseG1GC. Regionserver heap use reports are not of much use: {noformat} hbase(main):001:0 status 'simple' 3 live servers test3:60020 1247389283042 requests=0, regions=1, usedHeap=0, maxHeap=41 test2:60020 1247389219994 requests=0, regions=1, usedHeap=0, maxHeap=41 test4:60020 1247389324563 requests=0, regions=2, usedHeap=0, maxHeap=41 0 dead servers {noformat} top is about right: {noformat} PID USER PR NI VIRT RES SHR S %CPU %MEMTIME+ COMMAND 23988 hadoop24 0 1492m 98m 10m S 0.0 2.5 0:02.65 java {noformat} Incidentally, don't try -XX:+UseG1GC and -XX:+DoEscapeAnalysis together or the JVM will rapidly segfault. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira
[jira] [Commented] (HBASE-1648) heap usage and limit reporting doesn't work as expected when using G1 GC
[ https://issues.apache.org/jira/browse/HBASE-1648?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=13506375#comment-13506375 ] liang xie commented on HBASE-1648: -- emmm, it's not a hbase related bug, some jdk tools don't work well with G1 on jdk6 heap usage and limit reporting doesn't work as expected when using G1 GC Key: HBASE-1648 URL: https://issues.apache.org/jira/browse/HBASE-1648 Project: HBase Issue Type: Bug Environment: Linux Centos x86_64 5.3, Sun JDK 1.6.0_14 (HotSpot 64-Bit Server VM build 14.0-b16) Reporter: Andrew Purtell Priority: Minor Getting some early experience with the G1 GC. Running with -Xmx1000m and HBASE_OPTS set to -XX:+UnlockExperimentalVMOpts -XX:+UseG1GC. Regionserver heap use reports are not of much use: {noformat} hbase(main):001:0 status 'simple' 3 live servers test3:60020 1247389283042 requests=0, regions=1, usedHeap=0, maxHeap=41 test2:60020 1247389219994 requests=0, regions=1, usedHeap=0, maxHeap=41 test4:60020 1247389324563 requests=0, regions=2, usedHeap=0, maxHeap=41 0 dead servers {noformat} top is about right: {noformat} PID USER PR NI VIRT RES SHR S %CPU %MEMTIME+ COMMAND 23988 hadoop24 0 1492m 98m 10m S 0.0 2.5 0:02.65 java {noformat} Incidentally, don't try -XX:+UseG1GC and -XX:+DoEscapeAnalysis together or the JVM will rapidly segfault. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira
[jira] [Commented] (HBASE-1648) heap usage and limit reporting doesn't work as expected when using G1 GC
[ https://issues.apache.org/jira/browse/HBASE-1648?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanelfocusedCommentId=13506547#comment-13506547 ] stack commented on HBASE-1648: -- [~xieliang007] We should just close this then? heap usage and limit reporting doesn't work as expected when using G1 GC Key: HBASE-1648 URL: https://issues.apache.org/jira/browse/HBASE-1648 Project: HBase Issue Type: Bug Environment: Linux Centos x86_64 5.3, Sun JDK 1.6.0_14 (HotSpot 64-Bit Server VM build 14.0-b16) Reporter: Andrew Purtell Priority: Minor Getting some early experience with the G1 GC. Running with -Xmx1000m and HBASE_OPTS set to -XX:+UnlockExperimentalVMOpts -XX:+UseG1GC. Regionserver heap use reports are not of much use: {noformat} hbase(main):001:0 status 'simple' 3 live servers test3:60020 1247389283042 requests=0, regions=1, usedHeap=0, maxHeap=41 test2:60020 1247389219994 requests=0, regions=1, usedHeap=0, maxHeap=41 test4:60020 1247389324563 requests=0, regions=2, usedHeap=0, maxHeap=41 0 dead servers {noformat} top is about right: {noformat} PID USER PR NI VIRT RES SHR S %CPU %MEMTIME+ COMMAND 23988 hadoop24 0 1492m 98m 10m S 0.0 2.5 0:02.65 java {noformat} Incidentally, don't try -XX:+UseG1GC and -XX:+DoEscapeAnalysis together or the JVM will rapidly segfault. -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira