Hi, ted, today i counter the problem again, and I find the metrics of GCCOUNT G1 YOUNG GENERATION is related to the CPU LOAD, so this means it's GC problem?
The options for regionserver like below: /home/q/java/default/bin/java -Dproc_regionserver -XX:OnOutOfMemoryError=kill -9 %p -Xmx8192m -Xms8g -Xmx8g -XX:NewSize=4g -XX:MaxNewSize=4g -XX:PermSize=1g -XX:MaxPermSize=1g -server -XX:+DisableExplicitGC -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:+UseFastAccessorMethods -XX:+UseCMSInitiatingOccupancyOnly -XX:CMSInitiatingOccupancyFraction=75 -XX:SoftRefLRUPolicyMSPerMB=0 -XX:+PrintClassHistogram -XX:+PrintGCDetails -XX:+PrintGCDateStamps -XX:+PrintHeapAtGC -Xloggc:/home/q/hbase/hbase-0.98.6-cdh5.2.0/logs/gc-l-hbase1.dba.cn1-hbase.log -XX:ParallelGCThreads=10 -Xms64g -Xmx64g -XX:NewSize=4g -XX:MaxNewSize=4g -XX:PermSize=1g -XX:MaxPermSize=1g -server -XX:+DisableExplicitGC -XX:+UnlockExperimentalVMOptions -XX:+UseG1GC -XX:+UseFastAccessorMethods -XX:+UseCMSInitiatingOccupancyOnly -XX:CMSInitiatingOccupancyFraction=75 -XX:SoftRefLRUPolicyMSPerMB=0 -XX:+PrintClassHistogram -XX:+PrintGCDetails -XX:+PrintGCDateStamps -XX:+PrintHeapAtGC -Xloggc:/home/q/hbase/hbase-0.98.6-cdh5.2.0/logs/gc-l-hbase1.dba.cn1-hbase.log -XX:ParallelGCThreads=10 -Dcom.sun.management.jmxremote.ssl=false -Dcom.sun.management.jmxremote.authenticate=false -Dcom.sun.management.jmxremote.port=10102 -Dhbase.log.dir=/home/q/hbase/hbase-0.98.6-cdh5.2.0/bin/../logs -Dhbase.log.file=hbase-hadoop-regionserver-l-hbase1.dba.cn1.log -Dhbase.home.dir=/home/q/hbase/hbase-0.98.6-cdh5.2.0/bin/.. -Dhbase.id.str=hadoop -Dhbase.root.logger=INFO,RFA -Djava.library.path=/home/q/hadoop/hadoop-2.3.0-cdh5.1.0/lib/native:/home/q/hbase/hbase-0.98.6-cdh5.2.0/bin/../lib/native/Linux-amd64-64 -Dhbase.security.logger=INFO,RFAS org.apache.hadoop.hbase.regionserver.HRegionServer start Any idea? 2015-05-20 11:07 GMT+08:00 Louis Hust <[email protected]>: > Hi, @ted, > > It seems not only affect the table ttsi_order:ttsi_order_process, some > other table's region also flushed and compact > > 2015-05-20 11:04 GMT+08:00 Louis Hust <[email protected]>: > >> Hi, ted >> >> hbase(main):001:0> describe 'ttsi_order:ttsi_order_process' >> DESCRIPTION >> ENABLED >> 'ttsi_order:ttsi_order_process', {NAME => 'orderinfo', >> DATA_BLOCK_ENCODING => 'NO true >> NE', BLOOMFILTER => 'ROW', REPLICATION_SCOPE => '0', VERSIONS => '1', >> COMPRESSION >> => 'NONE', MIN_VERSIONS => '0', TTL => 'FOREVER', KEEP_DELETED_CELLS => >> 'FALSE', >> BLOCKSIZE => '65536', IN_MEMORY => 'false', BLOCKCACHE => 'true'} >> 1 row(s) in 1.0260 seconds >> >> >> 2015-05-20 10:59 GMT+08:00 Ted Yu <[email protected]>: >> >>> How many column families does your table have ? >>> >>> Can you show us the output of " describe 'ttsi_order:ttsi_order_process' >>> " ? >>> >>> Thanks >>> >>> On Tue, May 19, 2015 at 4:56 AM, Louis Hust <[email protected]> >>> wrote: >>> >>> > Hi, all >>> > >>> > My cluster is cdh5.2.0 with hbase 0.98.6, and recently some region >>> server >>> > load is very high, >>> > about 50, and the CPU usage is about 2400%(with 24 core). >>> > >>> > I check the log in region server, and found frequent memstore flush and >>> > compactions, is this the reason for the high load? >>> > >>> > {log} >>> > 2015-05-19 08:40:21,749 INFO [MemStoreFlusher.0] regionserver.HRegion: >>> > Started memstore flush for >>> > >>> > >>> ttsi_order:ttsi_order_process,fceaa9d2804f005B,1431599229048.378c4f2ebc93770ef6cbf956de60d093., >>> > current region memstore size 1.1 M >>> > 2015-05-19 08:40:21,917 INFO [MemStoreFlusher.0] >>> > regionserver.DefaultStoreFlusher: Flushed, sequenceid=11905428, >>> memsize=1.1 >>> > M, hasBloomFilter=true, into tmp file >>> > >>> > >>> hdfs://mycluster:8020/hbase/airfare/data/ttsi_order/ttsi_order_process/378c4f2ebc93770ef6cbf956de60d093/.tmp/6fab6457782048898b1547c422fc0c82 >>> > 2015-05-19 08:40:21,934 DEBUG [MemStoreFlusher.0] >>> > regionserver.HRegionFileSystem: Committing store file >>> > >>> > >>> hdfs://mycluster:8020/hbase/airfare/data/ttsi_order/ttsi_order_process/378c4f2ebc93770ef6cbf956de60d093/.tmp/6fab6457782048898b1547c422fc0c82 >>> > as >>> > >>> > >>> hdfs://mycluster:8020/hbase/airfare/data/ttsi_order/ttsi_order_process/378c4f2ebc93770ef6cbf956de60d093/orderinfo/6fab6457782048898b1547c422fc0c82 >>> > 2015-05-19 08:40:21,941 INFO [MemStoreFlusher.0] regionserver.HStore: >>> > Added >>> > >>> > >>> hdfs://mycluster:8020/hbase/airfare/data/ttsi_order/ttsi_order_process/378c4f2ebc93770ef6cbf956de60d093/orderinfo/6fab6457782048898b1547c422fc0c82, >>> > entries=1441, sequenceid=11905428, filesize=847.8 K >>> > 2015-05-19 08:40:21,941 INFO [MemStoreFlusher.0] regionserver.HRegion: >>> > Finished memstore flush of ~1.1 M/1126904, currentsize=0/0 for region >>> > >>> > >>> ttsi_order:ttsi_order_process,fceaa9d2804f005B,1431599229048.378c4f2ebc93770ef6cbf956de60d093. >>> > in 192ms, sequenceid=11905428, compaction requested=true >>> > 2015-05-19 08:40:21,941 DEBUG [MemStoreFlusher.0] >>> > regionserver.CompactSplitThread: Small Compaction requested: system; >>> > Because: MemStoreFlusher.0; compaction_queue=(0:0), split_queue=0, >>> > merge_queue=0 >>> > 2015-05-19 08:40:21,941 DEBUG >>> > [regionserver60020-smallCompactions-1431261234450] >>> > compactions.RatioBasedCompactionPolicy: Selecting compaction from 4 >>> store >>> > files, 0 compacting, 4 eligible, 30 blocking >>> > 2015-05-19 08:40:21,941 DEBUG >>> > [regionserver60020-smallCompactions-1431261234450] >>> > compactions.ExploringCompactionPolicy: Exploring compaction algorithm >>> has >>> > selected 3 files of size 36749798 starting at candidate #1 after >>> > considering 3 permutations with 1 in ratio >>> > 2015-05-19 08:40:21,941 DEBUG >>> > [regionserver60020-smallCompactions-1431261234450] regionserver.HStore: >>> > 378c4f2ebc93770ef6cbf956de60d093 - orderinfo: Initiating minor >>> compaction >>> > 2015-05-19 08:40:21,941 INFO >>> > [regionserver60020-smallCompactions-1431261234450] >>> regionserver.HRegion: >>> > Starting compaction on orderinfo in region >>> > >>> > >>> ttsi_order:ttsi_order_process,fceaa9d2804f005B,1431599229048.378c4f2ebc93770ef6cbf956de60d093. >>> > 2015-05-19 08:40:21,942 INFO >>> > [regionserver60020-smallCompactions-1431261234450] >>> regionserver.HStore: >>> > Starting compaction of 3 file(s) in orderinfo of >>> > >>> > >>> ttsi_order:ttsi_order_process,fceaa9d2804f005B,1431599229048.378c4f2ebc93770ef6cbf956de60d093. >>> > into >>> > >>> > >>> tmpdir=hdfs://mycluster:8020/hbase/airfare/data/ttsi_order/ttsi_order_process/378c4f2ebc93770ef6cbf956de60d093/.tmp, >>> > totalSize=35.0 M >>> > 2015-05-19 08:40:21,942 DEBUG >>> > [regionserver60020-smallCompactions-1431261234450] >>> compactions.Compactor: >>> > Compacting >>> > >>> > >>> hdfs://mycluster:8020/hbase/airfare/data/ttsi_order/ttsi_order_process/378c4f2ebc93770ef6cbf956de60d093/orderinfo/a89297d7bbc34db7aa9f23e42789e2bd, >>> > keycount=22628, bloomtype=ROW, size=33.8 M, encoding=NONE, >>> seqNum=11902843 >>> > 2015-05-19 08:40:21,942 DEBUG >>> > [regionserver60020-smallCompactions-1431261234450] >>> compactions.Compactor: >>> > Compacting >>> > >>> > >>> hdfs://mycluster:8020/hbase/airfare/data/ttsi_order/ttsi_order_process/378c4f2ebc93770ef6cbf956de60d093/orderinfo/d1f8531b00fa4f77ad901001ebe39644, >>> > keycount=512, bloomtype=ROW, size=468.8 K, encoding=NONE, >>> seqNum=11903863 >>> > 2015-05-19 08:40:21,942 DEBUG >>> > [regionserver60020-smallCompactions-1431261234450] >>> compactions.Compactor: >>> > Compacting >>> > >>> > >>> hdfs://mycluster:8020/hbase/airfare/data/ttsi_order/ttsi_order_process/378c4f2ebc93770ef6cbf956de60d093/orderinfo/6fab6457782048898b1547c422fc0c82, >>> > keycount=597, bloomtype=ROW, size=847.8 K, encoding=NONE, >>> seqNum=11905428 >>> > {/log} >>> > >>> > Why the flush so small memstore which just 1.1 M, and many other flush >>> > even small than 1M。 >>> > >>> > >>> > My configuration: >>> > >>> > RegionServer: MaxHeap: 64G >>> > hbase.hregion.memstore.flush.size = 128M >>> > hbase.regionserver.global.memstore.upperLimit=0.4 >>> > hbase.regionserver.global.memstore.lowerLimit=0.38 >>> > hbase.hregion.memstore.block.multiplier=4 >>> > hbase.hregion.memstore.mslab.enabled=true >>> > hbase.hregion.max.filesize = 10G >>> > hbase.hstore.compaction.max=10 >>> > hbase.hstore.compactionThreshold=3 >>> > hbase.hstore.compaction.kv.max=10 >>> > >>> > And the region server has 223 regions. >>> > >>> >> >> >
