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https://issues.apache.org/jira/browse/DERBY-5980?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Mike Matrigali updated DERBY-5980:
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Component/s: Store
> Extremely slow roll forward when booting database that wasn't properly closed
> -----------------------------------------------------------------------------
>
> Key: DERBY-5980
> URL: https://issues.apache.org/jira/browse/DERBY-5980
> Project: Derby
> Issue Type: Bug
> Components: Store
> Affects Versions: 10.9.1.0
> Environment: Windows 7, Embedded mode
> Reporter: Igor Sereda
>
> Reproduction sequence:
> 1. Open database in embedded mode
> 2. Run a considerably large transaction - for example, one that creates 10 -
> 20 MB of db logs
> 3. Commit
> 4. Do NOT close the Connection
> 5. Exit the application (through System.exit() for example)
> 6. Restart the application and open the database
> Observed:
> Opening connection is extremely slow. It takes up 30- 60 seconds on the 10-20
> MB transaction, and for larger transactions it takes forever.
> Looking at the process with FileMon utility, I can see that redo log files
> are mostly read *1 byte at a time*. :(
> I bet you can improve the performance 100-fold by getting the whole log into
> memory first.
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