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https://issues.apache.org/jira/browse/JENA-703?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14018658#comment-14018658
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Rob Vesse commented on JENA-703:
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It is worth noting that for scenarios like JENA-689 where the system has
continuous high load the side effect of this change would be that queries may
experience delays
> TDB - Ensure readers don't block writeback forever.
> ---------------------------------------------------
>
> Key: JENA-703
> URL: https://issues.apache.org/jira/browse/JENA-703
> Project: Apache Jena
> Issue Type: Improvement
> Components: TDB
> Affects Versions: Jena 2.11.1
> Reporter: Andy Seaborne
>
> The commit queue can only be flushed when the main storage is quiet. A
> stream of readers can lead to the main storage never being quiet.
> One possibility is to place a maximum (quite high) on the number of readers
> allowed after the decision to flush the journal to main storage. If exceeded,
> then lock readers for a while, flush and resume.
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