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https://issues.apache.org/jira/browse/DERBY-2939?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Dyre Tjeldvoll updated DERBY-2939:
----------------------------------
Fix Version/s: 10.4.0.0
This issue has no fix version, but has been checked in to trunk after the 10.3
branch was cut, and has not been merged to the 10.3 branch (before the last
release).
(Some have been checked into trunk after 10.4 was cut and then merged to 10.4).
> Log file is flushed every time a log buffer gets full
> -----------------------------------------------------
>
> Key: DERBY-2939
> URL: https://issues.apache.org/jira/browse/DERBY-2939
> Project: Derby
> Issue Type: Bug
> Components: Store
> Affects Versions: 10.3.1.4, 10.4.0.0
> Reporter: Jørgen Løland
> Assignee: Jørgen Løland
> Fix For: 10.4.0.0
>
> Attachments: derby-2939-1.diff, derby-2939-1.stat, derby-2939-2.diff,
> derby-2939-2.stat, derby-2939-3.diff, derby-2939-3bugfix.diff
>
>
> LogAccessFile consists of a number of log buffers:
> LinkedList<LogAccessFileBuffer> freeBuffers and dirtyBuffers, and
> LogAccessFileBuffer currentBuffer.
> When a log record is written to log, writeLogRecord wrongly assumes that the
> log record is too big to fit in any log buffer if there is not enough free
> space in the current log buffer. The code:
> if (total_log_record_length <= currentBuffer.bytes_free) {
> <append log record to current buffer>
> ...
> } else {
> <log record too big to fit in any buffer>
> ...
> }
> should be modified to:
> if (total_log_record_length <= currentBuffer.bytes_free) {
> <append log record to current buffer>
> ...
> } else if (total_log_record_length <= currentBuffer.length) {
> <swap log buffer>
> <append log record to new current buffer>
> ...
> } else {
> <log record too big to fit in any buffer>
> ...
> }
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