phoenix-dev mailing list archives

Site index · List index
Message view « Date » · « Thread »
Top « Date » · « Thread »
From "Lars Hofhansl (JIRA)" <j...@apache.org>
Subject [jira] [Created] (PHOENIX-4148) COUNT(DISTINCT(...)) should have a memory size limit
Date Fri, 01 Sep 2017 05:45:00 GMT
Lars Hofhansl created PHOENIX-4148:
--------------------------------------

             Summary: COUNT(DISTINCT(...)) should have a memory size limit
                 Key: PHOENIX-4148
                 URL: https://issues.apache.org/jira/browse/PHOENIX-4148
             Project: Phoenix
          Issue Type: Bug
            Reporter: Lars Hofhansl


I just managed to kill (hang) a region server by issuing a COUNT(DISTINCT(...)) query over
a column with very high cardinality (20m in this case).
This is perhaps not a useful thing to do, but Phoenix should nonetheless not allow to have
a server fail because of a query.

[~jamestaylor], I see there GlobalMemoryManager, but I do not quite see how I'd get a reference
to one, once needs a tenant id, etc.




--
This message was sent by Atlassian JIRA
(v6.4.14#64029)

Mime
View raw message