[ https://issues.apache.org/jira/browse/HBASE-9467 ]
shreedurgapg deleted comment on HBASE-9467: ------------------------------------- was (Author: JIRAUSER283692): Thanks.. [pg accomodation in gurgaon sector 49|https://shreedurgapg.com/] [pg in sector 33 gurgaon|https://shreedurgapg.com/] [pg accomodation in gurgaon sector 48|https://shreedurgapg.com/] [boys pg in sector 49 gurgaon|https://shreedurgapg.com/] > write can be totally blocked temporarily by a write-heavy region > ---------------------------------------------------------------- > > Key: HBASE-9467 > URL: https://issues.apache.org/jira/browse/HBASE-9467 > Project: HBase > Issue Type: Improvement > Reporter: Honghua Feng > Assignee: Honghua Feng > Priority: Major > Fix For: 0.98.0, 0.96.0 > > Attachments: HBASE-9467-trunk-v0.patch, HBASE-9467-trunk-v1.patch, > HBASE-9467-trunk-v1.patch, HBASE-9467-trunk-v1.patch > > > Write to a region can be blocked temporarily if the memstore of that region > reaches the threshold(hbase.hregion.memstore.block.multiplier * > hbase.hregion.flush.size) until the memstore of that region is flushed. > For a write-heavy region, if its write requests saturates all the handler > threads of that RS when write blocking for that region occurs, requests of > other regions/tables to that RS also can't be served due to no available > handler threads...until the pending writes of that write-heavy region are > served after the flush is done. Hence during this time period, from the RS > perspective it can't serve any request from any table/region just due to a > single write-heavy region. > This sounds not very reasonable, right? Maybe write requests from a region > can only be served by a sub-set of the handler threads, and then write > blocking of any single region can't lead to the scenario mentioned above? > Comment? -- This message was sent by Atlassian Jira (v8.20.1#820001)