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https://issues.apache.org/jira/browse/CASSANDRA-6042?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13771401#comment-13771401
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Jeremiah Jordan edited comment on CASSANDRA-6042 at 9/18/13 11:45 PM:
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Or we can set it as DEBUG, and people can enable the message when they need to
debug it. But *I* still like the idea of yelling at people who are "doing it
wrong". Even at DEBUG I would still put some kind of threshold on it, as you
don't want EVERY read triggering the log message, though at DEBUG it could be
small, like 100 or 200.
was (Author: jjordan):
Or we can set it as DEBUG, and people can enable the message when they need
to debug it. But *I* still like the idea of yelling at people who are "doing
it wrong".
> Add WARN when there are a lot of tombstones in a query
> ------------------------------------------------------
>
> Key: CASSANDRA-6042
> URL: https://issues.apache.org/jira/browse/CASSANDRA-6042
> Project: Cassandra
> Issue Type: Improvement
> Reporter: Jeremiah Jordan
> Assignee: Lyuben Todorov
> Priority: Minor
> Fix For: 1.2.10
>
>
> Now that we count the number of tombstones hit (so it can go in tracing), can
> we pick some threshold (or make it configurable with 0 being don't warn), and
> spit out a warning saying "Just went through 10000 tombstones in partition
> XYZ".
> Right now if you are having GC problems because some row got a bunch of
> tombstones, you can turn on server side tracing, and hope the bad query gets
> in there, or you can keep making heap dumps, dig through them, and hope you
> catch the query in there.
> I have seen code problems at multiple places causing this same issue (some
> code causing way more tombstones than it should, for just one row). And it
> is a PITA+Luck to debug it right now.
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