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  1. Cassandra
  2. CASSANDRA-5906

Avoid allocating over-large bloom filters

    Details

    • Type: Improvement
    • Status: Resolved
    • Priority: Major
    • Resolution: Fixed
    • Fix Version/s: 2.1 beta1
    • Component/s: None
    • Labels:
      None

      Description

      We conservatively estimate the number of partitions post-compaction to be the total number of partitions pre-compaction. That is, we assume the worst-case scenario of no partition overlap at all.

      This can result in substantial memory wasted in sstables resulting from highly overlapping compactions.

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        1. 5906.txt
          205 kB
          Yuki Morishita

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              • Assignee:
                yukim Yuki Morishita
                Reporter:
                jbellis Jonathan Ellis
                Reviewer:
                Jonathan Ellis
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                Dates

                • Created:
                  Updated:
                  Resolved: