vmstat 2 for 2 mins below. Looks like everything is in idle (github gist paste if it's easier to read: http://gist.github.com/532512):
procs -----------memory---------- ---swap-- -----io---- -system-- ----cpu---- r b swpd free buff cache si so bi bo in cs us sy id wa 0 0 0 15097116 248428 1398444 0 0 0 50 5 24 0 0 100 0 0 0 0 15096948 248428 1398444 0 0 0 0 281 281 0 0 100 0 0 0 0 15096948 248428 1398444 0 0 0 0 279 260 0 0 100 0 0 0 0 15096948 248428 1398444 0 0 0 0 199 216 0 0 100 0 4 0 0 15096612 248428 1398448 0 0 0 0 528 467 0 0 100 0 0 0 0 15096612 248428 1398448 0 0 0 0 208 213 0 0 100 0 4 0 0 15096460 248428 1398448 0 0 0 0 251 261 0 0 100 0 0 0 0 15096460 248428 1398448 0 0 0 12 242 248 0 0 100 0 0 0 0 15096460 248428 1398448 0 0 0 34 228 230 0 0 100 0 0 0 0 15096476 248428 1398448 0 0 0 0 266 272 0 0 100 0 0 0 0 15096324 248428 1398448 0 0 0 10 179 206 0 0 100 0 1 0 0 15096340 248428 1398448 0 0 0 0 225 254 0 0 100 0 1 0 0 15096188 248428 1398448 0 0 0 0 263 245 0 0 100 0 0 0 0 15096188 248428 1398448 0 0 0 2 169 210 0 0 100 0 0 0 0 15096188 248428 1398448 0 0 0 0 201 238 0 0 100 0 0 0 0 15096036 248428 1398448 0 0 0 10 174 202 0 0 100 0 0 0 0 15096036 248428 1398448 0 0 0 6 207 222 0 0 100 0 0 0 0 15095884 248428 1398448 0 0 0 0 198 242 0 0 100 0 2 0 0 15095884 248428 1398448 0 0 0 0 177 215 0 0 100 0 0 0 0 15095884 248428 1398448 0 0 0 0 244 265 0 0 100 0 0 0 0 15095732 248428 1398448 0 0 0 4 197 222 0 0 100 0 6 0 0 15095732 248428 1398448 0 0 0 6 267 260 0 0 100 0 0 0 0 15095732 248428 1398448 0 0 0 0 240 239 0 0 100 0 0 0 0 15095580 248428 1398448 0 0 0 8 180 210 0 0 100 0 5 0 0 15095580 248428 1398448 0 0 0 0 193 224 0 0 100 0 1 0 0 15095580 248428 1398448 0 0 0 36 161 191 0 0 100 0 0 0 0 15095428 248428 1398448 0 0 0 0 176 216 0 0 100 0 4 0 0 15095428 248428 1398448 0 0 0 0 202 236 0 0 100 0 0 0 0 15095428 248428 1398448 0 0 0 6 191 220 0 0 100 0 1 0 0 15095428 248428 1398448 0 0 0 0 188 238 0 0 100 0 2 0 0 15095276 248428 1398448 0 0 0 0 174 206 0 0 100 0 1 0 0 15095276 248428 1398448 0 0 0 0 225 249 0 0 100 0 0 0 0 15095124 248428 1398448 0 0 0 0 222 263 0 0 100 0 1 0 0 15095124 248428 1398448 0 0 0 6 187 236 0 0 100 0 5 0 0 15094940 248428 1398448 0 0 0 0 453 434 0 0 100 0 4 0 0 15094788 248428 1398448 0 0 0 2 227 225 0 0 100 0 0 0 0 15094788 248428 1398448 0 0 0 0 213 236 0 0 100 0 4 0 0 15094788 248428 1398448 0 0 0 6 257 253 0 0 100 0 0 0 0 15094636 248428 1398448 0 0 0 0 215 230 0 0 100 0 0 0 0 15094652 248428 1398448 0 0 0 0 259 285 0 0 100 0 0 0 0 15094500 248428 1398448 0 0 0 14 194 219 0 0 100 0 0 0 0 15094516 248428 1398448 0 0 0 0 227 257 0 0 100 0 4 0 0 15094516 248428 1398448 0 0 0 36 266 263 0 0 100 0 1 0 0 15094516 248428 1398448 0 0 0 0 202 213 0 0 100 0 0 0 0 15094364 248428 1398448 0 0 0 0 204 240 0 0 100 0 0 0 0 15094212 248428 1398448 0 0 0 6 161 194 0 0 100 0 0 0 0 15094212 248428 1398448 0 0 0 0 191 215 0 0 100 0 1 0 0 15094212 248428 1398448 0 0 0 0 216 238 0 0 100 0 5 0 0 15094212 248428 1398448 0 0 0 6 169 202 0 0 100 0 0 0 0 15094060 248428 1398448 0 0 0 0 172 216 0 0 100 0 2 0 0 15094060 248428 1398448 0 0 0 6 201 196 0 0 100 0 1 0 0 15094060 248428 1398448 0 0 0 0 196 218 0 0 100 0 procs -----------memory---------- ---swap-- -----io---- -system-- ----cpu---- r b swpd free buff cache si so bi bo in cs us sy id wa 0 0 0 15093908 248428 1398448 0 0 0 0 206 236 0 0 100 0 4 0 0 15093908 248428 1398448 0 0 0 0 197 219 0 0 100 0 0 0 0 15093908 248428 1398448 0 0 0 0 186 227 0 0 100 0 0 0 0 15093756 248428 1398448 0 0 0 0 168 182 0 0 100 0 0 0 0 15093756 248428 1398448 0 0 0 0 206 239 0 0 100 0 0 0 0 15093604 248428 1398448 0 0 0 6 281 248 0 0 100 0 0 0 0 15093452 248428 1398448 0 0 0 0 185 198 0 0 100 0 5 0 0 15093452 248428 1398448 0 0 0 0 265 253 0 0 100 0 0 0 0 15093300 248428 1398448 0 0 0 36 194 211 0 0 100 0 0 0 0 15093300 248428 1398448 0 0 0 0 228 242 0 0 100 0 0 0 0 15093300 248428 1398448 0 0 0 0 290 262 0 0 100 0 0 0 0 15093300 248428 1398448 0 0 0 6 187 207 0 0 100 0 On Tue, Aug 17, 2010 at 6:54 PM, Ryan Rawson <[email protected]> wrote: > what does vmstat say? Run it like 'vmstat 2' for a minute or two and > paste the results. > > With no cpu being consumed by java, it seems like there must be > another hidden variable here. Some zombied process perhaps. Or some > kind of super IO wait or something else. > > Since you are running on a hypervisor environment, i cant really say > what is happening to your instance, although one would think the LA > numbers would be unaffected by outside processes. > > On Tue, Aug 17, 2010 at 3:49 PM, George P. Stathis <[email protected]> > wrote: >> Actually, there is nothing in %wa but a ton sitting in %id. This is >> from the Master: >> >> top - 18:30:24 up 5 days, 20:10, 1 user, load average: 2.55, 1.99, 1.25 >> Tasks: 89 total, 1 running, 88 sleeping, 0 stopped, 0 zombie >> Cpu(s): 0.0%us, 0.0%sy, 0.0%ni, 99.8%id, 0.0%wa, 0.0%hi, 0.0%si, >> 0.2%st >> Mem: 17920228k total, 2795464k used, 15124764k free, 248428k buffers >> Swap: 0k total, 0k used, 0k free, 1398388k cached >> >> I have atop installed which is reporting the hadoop/hbase java daemons >> as the most active processes (barely taking any CPU time though and >> most of the time in sleep mode): >> >> ATOP - domU-12-31-39-18-1 2010/08/17 18:31:46 10 seconds >> elapsed >> PRC | sys 0.01s | user 0.00s | #proc 89 | #zombie 0 | #exit >> 0 | >> CPU | sys 0% | user 0% | irq 0% | idle 200% | wait >> 0% | >> cpu | sys 0% | user 0% | irq 0% | idle 100% | cpu000 w >> 0% | >> CPL | avg1 2.55 | avg5 2.12 | avg15 1.35 | csw 2397 | intr >> 2034 | >> MEM | tot 17.1G | free 14.4G | cache 1.3G | buff 242.6M | slab >> 193.1M | >> SWP | tot 0.0M | free 0.0M | | vmcom 1.6G | vmlim >> 8.5G | >> NET | transport | tcpi 330 | tcpo 169 | udpi 566 | udpo >> 147 | >> NET | network | ipi 896 | ipo 316 | ipfrw 0 | deliv >> 896 | >> NET | eth0 ---- | pcki 777 | pcko 197 | si 248 Kbps | so 70 >> Kbps | >> NET | lo ---- | pcki 119 | pcko 119 | si 9 Kbps | so 9 >> Kbps | >> >> PID CPU COMMAND-LINE 1/1 >> 17613 0% atop >> 17150 0% /usr/lib/jvm/java-6-sun/bin/java -Xmx2048m >> -XX:+HeapDumpOnOutOfMemor >> 16527 0% /usr/lib/jvm/java-6-sun/bin/java -Xmx2048m -server >> -Dcom.sun.managem >> 16839 0% /usr/lib/jvm/java-6-sun/bin/java -Xmx2048m -server >> -Dcom.sun.managem >> 16735 0% /usr/lib/jvm/java-6-sun/bin/java -Xmx2048m -server >> -Dcom.sun.managem >> 17083 0% /usr/lib/jvm/java-6-sun/bin/java -Xmx2048m >> -XX:+HeapDumpOnOutOfMemor >> >> Same with atop: >> >> PID USER PRI NI VIRT RES SHR S CPU% MEM% TIME+ Command >> 16527 ubuntu 20 0 2352M 98M 10336 S 0.0 0.6 0:42.05 >> /usr/lib/jvm/java-6-sun/bin/java -Xmx2048m -server >> -Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote >> -Dhadoop.log.dir=/var/log/h >> 16735 ubuntu 20 0 2403M 81544 10236 S 0.0 0.5 0:01.56 >> /usr/lib/jvm/java-6-sun/bin/java -Xmx2048m -server >> -Dcom.sun.management.jmxremote -Dcom.sun.management.jmxremote >> -Dhadoop.log.dir=/var/log/h >> 17083 ubuntu 20 0 4557M 45388 10912 S 0.0 0.3 0:00.65 >> /usr/lib/jvm/java-6-sun/bin/java -Xmx2048m >> -XX:+HeapDumpOnOutOfMemoryError -XX:+UseConcMarkSweepGC >> -XX:+CMSIncrementalMode -server -XX:+Heap >> 1 root 20 0 23684 1880 1272 S 0.0 0.0 0:00.23 /sbin/init >> 587 root 20 0 247M 4088 2432 S 0.0 0.0 -596523h-14:-8 >> /usr/sbin/console-kit-daemon --no-daemon >> 3336 root 20 0 49256 1092 540 S 0.0 0.0 0:00.36 /usr/sbin/sshd >> 16430 nobody 20 0 34408 3704 1060 S 0.0 0.0 0:00.01 gmond >> 17150 ubuntu 20 0 2519M 112M 11312 S 0.0 0.6 -596523h-14:-8 >> /usr/lib/jvm/java-6-sun/bin/java -Xmx2048m >> -XX:+HeapDumpOnOutOfMemoryError -XX:+UseConcMarkSweepGC >> -XX:+CMSIncrementalMode -server -XX >> >> >> So I'm a bit perplexed. Are there any hadoop / hbase specific tricks >> that can reveal what these processes are doing? >> >> -GS >> >> >> >> On Tue, Aug 17, 2010 at 6:14 PM, Jean-Daniel Cryans <[email protected]> >> wrote: >>> >>> It's not normal, but then again I don't have access to your machines >>> so I can only speculate. >>> >>> Does "top" show you which process is in %wa? If so and it's a java >>> process, can you figure what's going on in there? >>> >>> J-D >>> >>> On Tue, Aug 17, 2010 at 11:03 AM, George Stathis <[email protected]> wrote: >>> > Hello, >>> > >>> > We have just setup a new cluster on EC2 using Hadoop 0.20.2 and HBase >>> > 0.20.3. Our small setup as of right now consists of one master and four >>> > slaves with a replication factor of 2: >>> > >>> > Master: xLarge instance with 2 CPUs and 17.5 GB RAM - runs 1 namenode, 1 >>> > secondarynamenode, 1 jobtracker, 1 hbasemaster, 1 zookeeper (uses its' own >>> > dedicated EMS drive) >>> > Slaves: xLarge instance with 2 CPUs and 17.5 GB RAM each - run 1 >>> > datanode, 1 >>> > tasktracker, 1 regionserver >>> > >>> > We have also installed Ganglia to monitor the cluster stats as we are >>> > about >>> > to run some performance tests but, right out of the box, we are noticing >>> > high system loads (especially on the master node) without any activity >>> > happening on the clister. Of course, the CPUs are not being utilized at >>> > all, >>> > but Ganglia is reporting almost all nodes in the red as the 1, 5 an 15 >>> > minute load times are all above 100% most of the time (i.e. there are more >>> > than two processes at a time competing for the 2 CPUs time). >>> > >>> > Question1: is this normal? >>> > Question2: does it matter since each process barely uses any of the CPU >>> > time? >>> > >>> > Thank you in advance and pardon the noob questions. >>> > >>> > -GS >>> > >> >
