A 2.8.0-rc1 mongod with wired tiger in LSM mode is using 100% CPU. It isn't doing any user operations.
Start command:
/usr/share/mongodb-linux-x86_64-2.8.0-rc1/bin/mongod --dbpath ./wttiger3/ --port 30020 --logpath ./wttiger3/log.log --storageEngine=wiredTiger --wiredTigerCollectionConfig type=lsm,block_compressor= --fork
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Top:
top - 16:12:02 up 16 days, 7:05, 7 users, load average: 1.19, 1.15, 1.24
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Tasks: 354 total, 2 running, 351 sleeping, 0 stopped, 1 zombie
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%Cpu(s): 11.2 us, 0.6 sy, 0.0 ni, 88.2 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st
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KiB Mem: 24681876 total, 24451416 used, 230460 free, 29884 buffers
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KiB Swap: 8388604 total, 581668 used, 7806936 free. 842948 cached Mem
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PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
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6778 steve 20 0 0.120t 0.011t 254492 S 123.9 45.8 138:54.59 mongod
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23246 steve 20 0 1540472 779192 17560 S 21.3 3.2 572:54.92 chrome
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17126 steve 20 0 903068 196988 10688 S 10.3 0.8 494:15.92 chrome
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> db.currentOp()
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{ "inprog" : [ ] }
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> db.serverBuildInfo()
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{
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"version" : "2.8.0-rc1",
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"gitVersion" : "c8171e7f969519af8b87a43425ae291ee69a0191",
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"OpenSSLVersion" : "",
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"sysInfo" : "Linux build14.nj1.10gen.cc 2.6.32-431.3.1.el6.x86_64 #1 SMP Fri Jan 3 21:39:27 UTC 2014 x86_64 BOOST_LIB_VERSION=1_49",
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"loaderFlags" : "-fPIC -pthread -Wl,-z,now -rdynamic",
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"compilerFlags" : "-Wnon-virtual-dtor -Woverloaded-virtual -std=c++11 -fPIC -fno-strict-aliasing -ggdb -pthread -Wall -Wsign-compare -Wno-unknown-pragmas -Winvalid-pch -pipe -Werror -O3 -Wno-unused-local-typedefs -Wno-unused-function -Wno-deprecated-declarations -Wno-unused-but-set-variable -fno-builtin-memcmp -std=c99",
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"allocator" : "tcmalloc",
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"versionArray" : [
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2,
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8,
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0,
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-9
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],
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"javascriptEngine" : "V8",
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"bits" : 64,
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"debug" : false,
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"maxBsonObjectSize" : 16777216,
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"ok" : 1
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}
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