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Re: 答复: GC pause issues - HBase - [mail # user]
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...My total heap size is 12G and my young gen is 1G. I am getting 200ms pauses every few seconds - the machine has 4 cores (its m1.xlarge on ec2), if I set the young gen low. The one thing I no...
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Author: Varun Sharma,
2013-01-25, 17:55
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Re: 答复: GC pause issues - HBase - [mail # user]
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...I do have significant block cache churn and this issue is typical correlated with a huge increase in read latencies - could that be the reason for this - mslab should be taking care of the m...
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Author: Varun Sharma,
2013-01-25, 05:02
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Re: 答复: GC pause issues - HBase - [mail # user]
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...I am curious how reducing the memstore size would help - I have 6 regions and 3G total for memstore - so I would like max out on that by having a bigger flush size per region. Are you asking...
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Author: Varun Sharma,
2013-01-25, 02:30
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GC pause issues - HBase - [mail # user]
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...Hi, I have a region server which has the following logs. As you can see from the log, ParNew is sufficiently big (450M) and there are heavy writes going in. I am seeing 200ms pauses wh...
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Author: Varun Sharma,
2013-01-24, 17:40
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Region server crash while syncing HLog - HBase - [mail # user]
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...Hi, I had 2 region servers crash with this (running hbase-0.94.3 with hadoop-2.0.0). There is also stuff saying that Memstore was rolled back. Is this some kind of data loss happening ...
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Author: Varun Sharma,
2013-01-23, 17:57
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About HBase Region Flushes - HBase - [mail # user]
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...Hi, I have a question about hbase region flushes. Are reads and writes blocked while the memstore is being flushed ? Thanks !...
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Author: Varun Sharma,
2013-01-23, 00:13
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Re: Storing images in Hbase - HBase - [mail # user]
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...On Mon, Jan 21, 2013 at 5:10 PM, Varun Sharma wrote: ...
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Author: Varun Sharma,
2013-01-22, 01:12
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Re: Storing images in Hbase - HBase - [mail # user]
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...Thanks for the useful information. I wonder why you use only 5G heap when you have an 8G machine ? Is there a reason to not use all of it (the DataNode typically takes a 1G of RAM) On ...
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Author: Varun Sharma,
2013-01-22, 01:10
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Re: Hbase heap size - HBase - [mail # user]
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...I meant controlling compaction activity by emitting fewer hfiles but of larger size. On Fri, Jan 18, 2013 at 12:28 PM, Adrien Mogenet wrote: ...
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Author: Varun Sharma,
2013-01-18, 20:43
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Re: Hbase heap size - HBase - [mail # user]
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...Thanks, Lars ! In my case, the amount of data on disk is a lot lower so I can do with fewer regions. Neverthless, even if i set the flush cache too large - the memstore lowerLimit and ...
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Author: Varun Sharma,
2013-01-18, 17:50
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