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About "-XX:ThreadPriorityPolicy=42" - HBase - [mail # dev]
...I found two interesting vm options used in Casandra by default: "-XX:+UseThreadPriorities -XX:ThreadPriorityPolicy=42",  Here is a good article for it : http://tech.stolsvik.com/2010/01...
   Author: 谢良, 2013-11-15, 09:44
答复: Save the bandwidth usage - HBase - [mail # user]
...Have you enabled compression? could you show us more metric info about data locality? and maybe there're lots of running compaction activities? and could you tell us read/write countPerSecon...
   Author: 谢良, 2013-11-14, 09:08
答复: How can I insert large image or video into HBase? - HBase - [mail # user]
...Do you care about low latency?  if so, then maybe it's not a good choice to store big file into hbase, especially few G size, that's definitely will bring a GC hurt:)  Best, Liang ...
   Author: 谢良, 2013-10-23, 06:56
答复: What cause region server to timeout other than long gc? - HBase - [mail # user]
...Maybe you can try to add "-XX:+PrintGCApplicationStoppedTime", then if other ops(not gc) caused the long safepoint duration, you could find the log. btw, did you have a high load during that...
   Author: 谢良, 2013-10-23, 06:53
答复: You Are Dead Exception due to promotion failure - HBase - [mail # user]
...The OS will pick up a process to kill according to an internal oom score,weight...(very likely is HBase if it ran long time and consumed lots of memory) _____________________________________...
   Author: 谢良, 2013-10-08, 02:01
[expand - 2 more] - 答复: 答复: flushing + compactions after config change - HBase - [mail # user]
...btw, don't use "CMSIncrementalMode", iirc, it had been removed from hotspot upstream accually. ________________________________________ 发件人: Viral Bajaria [[EMAIL PROTECTED]] 发送时间: 2013年6月27...
   Author: 谢良, 2013-06-27, 10:36
答复: Possibility of using timestamp as row key in HBase - HBase - [mail # user]
...Or maybe you could try to revert your rowkey:) ________________________________________ 发件人: yun peng [[EMAIL PROTECTED]] 发送时间: 2013年6月20日 5:59 收件人: [EMAIL PROTECTED] 主题: Re: Possibility of ...
   Author: 谢良, 2013-06-20, 03:35
答复: Some HLog issues - HBase - [mail # dev]
...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...
   Author: 谢良, 2013-06-15, 01:02
转发: seem "SafepointTimeout" doesn't work well if sync takes too long ? - HBase - [mail # dev]
...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 ...
   Author: 谢良, 2013-04-28, 11:29
答复: HBase random read performance - HBase - [mail # user]
...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...
   Author: 谢良, 2013-04-15, 11:41
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NEW: Monitor These Apps!
elasticsearch, apache solr, apache hbase, hadoop, redis, casssandra, amazon cloudwatch, mysql, memcached, apache kafka, apache zookeeper, apache storm, ubuntu, centOS, red hat, debian, puppet labs, java, senseiDB