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答复: Some HLog issues - HBase - [mail # dev]
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...Personally, i hope to have a config key like "innodb_flush_log_at_trx_commit" playing in MySQL:) ________________________________________ 发件人: lars hofhansl [[EMAIL PROTECTED]] 发送时间: 2013年6月...
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Author: 谢良,
2013-06-15, 01:02
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转发: seem "SafepointTimeout" doesn't work well if sync takes too long ? - HBase - [mail # dev]
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...FYI. It would be pretty helpful if other folks hit the similar issue. Best, Liang ________________________________ 发件人: Peter Levart [[EMAIL PROTECTED]] 发送时间: 2013年4月28日 17:50 收件人: 谢良 ...
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Author: 谢良,
2013-04-28, 11:29
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答复: HBase random read performance - HBase - [mail # user]
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...First, it's probably helpless to set block size to 4KB, please refer to the beginning of HFile.java: Smaller blocks are good * for random access, but require more memory to hold...
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Author: 谢良,
2013-04-15, 11:41
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答复: hbase jvm problem - HBase - [mail # user]
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...Would you have a chance to test w/o UseAdaptiveSizePolicy option? There's a related hotspot issue discussed several days ago: http://marc.info/?l=openjdk-serviceability-dev&m=136367606426463...
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Author: 谢良,
2013-04-08, 02:29
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答复: Does HBase RegionServer benefit from OS Page Cache - HBase - [mail # user]
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...Maybe we should adopt some ideas from RDBMS ? In MySQL area: Innodb storage engine has a buffer pool(just like current block cache), caches both compressed and uncompressed pages in latest i...
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Author: 谢良,
2013-03-26, 03:01
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Is it feasible to delete qualified tombstones during minor compaction? - HBase - [mail # dev]
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...Currently, all tombstones only get cleaned up with major compactions. I guess the original design probably considered that we need to ensure whether there are other versions of the deleted k...
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Author: 谢良,
2013-03-14, 09:41
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答复: HBase CheckSum vs Hadoop CheckSum - HBase - [mail # user]
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...comments in line Regards, Liang ________________________________________ 发件人: Jean-Marc Spaggiari [[EMAIL PROTECTED]] 发送时间: 2013年2月26日 20:03 收件人: user 主题: HBase CheckSum vs Hadoop Chec...
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Author: 谢良,
2013-02-26, 12:24
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答复: 答复: 答复: GC frequency - HBase - [mail # user]
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...comments in line ________________________________________ 发件人: Varun Sharma [[EMAIL PROTECTED]] 发送时间: 2013年2月21日 17:21 收件人: [EMAIL PROTECTED] 主题: Re: 答复: 答复: GC frequency This is a ver...
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Author: 谢良,
2013-02-21, 09:39
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答复: 答复: GC frequency - HBase - [mail # user]
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...Here is a good formula to estimate: http://blog.ragozin.info/2011/06/understanding-gc-pauses-in-jvm-hotspots.html Hope it helpful:) ________________________________________ 发件人: Varun...
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Author: 谢良,
2013-02-21, 08:50
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答复: GC frequency - HBase - [mail # user]
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...Of course, you'll hit the nightmarish "CMS fragement" easier if NewSize too low:) Generally speaking, most of YGC should be less than 5ms for a normal size heap. maybe your load is too high ...
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Author: 谢良,
2013-02-21, 08:10
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