[teiid-issues] [JBoss JIRA] (TEIID-2714) Buffer defrag not working
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https://issues.jboss.org/browse/TEIID-2714?page=com.atlassian.jira.plugin...
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Steven Hawkins commented on TEIID-2714:
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The fix addressed several things:
1. the immediate issue that defrag was unable to read the appropriate header values for
storage blocks.
2. the notion of truncation and defrag were too intertwined - an empty storage file would
not be truncated as we wouldn't defrag it.
3. corrected that -1 would be returned as the compacted highest bit set when the segment
is empty
4. adjusted the thresholds for defrag and sleep behavior
Buffer defrag not working
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Key: TEIID-2714
URL: https://issues.jboss.org/browse/TEIID-2714
Project: Teiid
Issue Type: Bug
Components: Query Engine
Affects Versions: 7.7
Reporter: Steven Hawkins
Assignee: Steven Hawkins
Fix For: 8.6
The defrag task is not working as expected because the header values are written by an
object output stream - and not as standalone values into the block data.
For most data usage patterns this isn't an issue as the storage files are self
compacting over time due to low block assignments.
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