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From "Chris Goffinet (JIRA)" <>
Subject [jira] Commented: (CASSANDRA-436) OOM during major compaction on many (hundreds) of sstables
Date Wed, 16 Sep 2009 03:35:09 GMT


Chris Goffinet commented on CASSANDRA-436:

I will be testing this tonight on our cluster. I'll need roughly 15-20 hours but should have
some results tomorrow.

> OOM during major compaction on many (hundreds) of sstables
> ----------------------------------------------------------
>                 Key: CASSANDRA-436
>                 URL:
>             Project: Cassandra
>          Issue Type: Bug
>            Reporter: Jonathan Ellis
>            Assignee: Jonathan Ellis
>             Fix For: 0.5
>         Attachments: 0001-CASSANDRA-436-minor-fixes.txt, 0002-copy-FileStruct-to-SSTableScanner-and-remove-cruft.-M.txt,
0003-allow-ReducingIterator-to-reduce-from-one-type-to-a-di.txt, 0004-Replace-PriorityQueue-mess-with-a-CompactionIterator-t.txt
> compaction deserializes rows during compaction before they are needed, one per sstable.
 if we only deserialized on-demand the current algorithm would be fine on nearly arbitrarily
large numbers of sstables.  (this is only important b/c it is useful to disable compactions
during bulk load.)

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