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RE: HBase Region Server Spinning on JMX requests - HBase - [mail # user]
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...I created https://issues.apache.org/jira/browse/HBASE-8416 We're not using OpenTSDB, but we do have something similar grabbing the jmx data on a regular basis. Eventually, we mov...
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Author: Buckley,Ron,
2013-04-24, 11:37
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HBase Region Server Spinning on JMX requests - HBase - [mail # user]
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...This is with HBase 0.94.4 & CDH 4.1.1 This morning one our region servers (we have 44) stopped responding to the '/jmx' request. (It's working for regular activity.) Additionally...
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Author: Buckley,Ron,
2013-04-23, 13:57
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RE: Region server Memory Use is double the -Xmx setting - HBase - [mail # user]
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...Anoop, We use Snappy compression for all our tables. I tried '-XX:MaxDirectMemorySize=1g' on our test cluster last night. Ran great until major compactions started, then a...
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Author: Buckley,Ron,
2013-01-25, 02:11
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RE: Region server Memory Use is double the -Xmx setting - HBase - [mail # user]
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...Liang, Thanks. I wasn’t really aware that the direct memory could get that large. (Full disclosure, we did switch from jdk1.6.0_25 to jdk1.6.0_31 the last time we restarted HBase...
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Author: Buckley,Ron,
2013-01-23, 15:19
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Region server Memory Use is double the -Xmx setting - HBase - [mail # user]
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...We have a 50 node cluster replicating to a 6 node cluster. Both clusters are running CDH4.1.2 and HBase 0.94.2. Today we noticed that the region servers at our replica site are...
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Author: Buckley,Ron,
2013-01-22, 21:17
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Extremely long flush times - HBase - [mail # user]
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...We ran into this situation today on our production instance, I'm wondering if anyone has seen or knows a way around it. We were repeatedly updating the same 60,000 column wide ...
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Author: Buckley,Ron,
2012-08-06, 21:37
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RE: Powered By Page - HBase - [mail # user]
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...Stack/Lars, Here's an entry for OCLC: OCLC (www.worldcat.org) uses HBase as the main data store for WorldCat, a union catalog which aggregates the collections of 72,000 librarie...
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Author: Buckley,Ron,
2012-07-03, 11:29
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RE: Heavy Writes Block Reads to RegionServer - HBase - [mail # user]
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...Bryan, We ran into that same condition here last week doing pretty much the same thing. Maybe you're hitting it too. We found that the region server wasn't blocked all the time, ...
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Author: Buckley,Ron,
2012-05-16, 00:02
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RE: 0.92 and Read/writes not scaling - HBase - [mail # user]
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...Stack, We're about 80% random read and 20% random write. So, that would have been the mix that we were running. We'll try a test with Nagel On and then Nagel off, random wr...
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Author: Buckley,Ron,
2012-03-28, 17:56
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RE: 0.92 and Read/writes not scaling - HBase - [mail # user]
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...Juhani, We've been working on some similar performance testing on our 50 node cluster running 0.92.1 and CDH3U3. We were looking mostly at reads, but observed similar behavior. H...
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Author: Buckley,Ron,
2012-03-28, 12:41
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