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Lars Hofhansl commented on HBASE-7008: -------------------------------------- Sames with Nagles left on: tows with 1 column (100 bytes): ||Caching||ms/row|| |1|0.17| |10|0.003| |100|0.04 **| |1000|0.004| |2000|0.003| |5000|0.003| |10000|0.003| (**) Strange Nagles interaction here rows with 10 columns (100 bytes each) in a single column family: ||Caching||ms/row|| |1|0.8| |10|4 **| |100|0.3| |1000|0.002| |2000|0.002| |5000|0.002| |10000|0.002| (**) Strange Nagles interaction here rows with 10 columns (1000 bytes each) in a single column family: ||Caching||ms/row|| |1|40 **| |10|1.7| |100|0.3| |1000|0.08| |2000|0.08| |5000|0.07| |10000|0.1| (**) Nagles :) rows with 100 columns (1000 bytes each) in a single column family: ||Caching||ms/row|| |1|8| |10|3| |100|0.9| |1000|0.7| |2000|**| (**) Crashed the RegionServer in the default setting (OOM?) rows with 100 columns (10000 bytes each - so 1mb rows) in a single column family: ||Caching||ms/row|| |1|60| |10|12| |100|8| |1000|**| (**) Anything over 150 crashed the RegionServer in the default setting (OOM?) So disabling Nagels is not always better! > Set scanner caching to a better default > --------------------------------------- > > Key: HBASE-7008 > URL: https://issues.apache.org/jira/browse/HBASE-7008 > Project: HBase > Issue Type: Bug > Components: Client > Reporter: liang xie > Assignee: liang xie > Fix For: 0.94.3, 0.96.0 > > Attachments: 7008-0.94.txt, 7008-0.94-v2.txt, 7008-v3.txt, > 7008-v4.txt, HBASE-7008.patch, HBASE-7008-v2.patch > > > per > http://search-hadoop.com/m/qaRu9iM2f02/Set+scanner+caching+to+a+better+default%253F&subj=Set+scanner+caching+to+a+better+default+ > let's set to 100 by default -- This message is automatically generated by JIRA. If you think it was sent incorrectly, please contact your JIRA administrators For more information on JIRA, see: http://www.atlassian.com/software/jira