[infinispan-issues] [JBoss JIRA] (ISPN-11513) ComposedSegmentedLoadWriteStore should not iterate over segments in parallel

ComposedSegmentedLoadWriteStore should not iterate over segments in parallel ---------------------------------------------------------------------------- Key: ISPN-11513 URL: https://issues.redhat.com/browse/ISPN-11513 Project: Infinispan Issue Type: Bug Components: Core Affects Versions: 10.1.5.Final, 11.0.0.Dev03 Reporter: Dan Berindei Assignee: Will Burns Priority: Major Fix For: 11.0.0.Dev04, 11.0.0.Final {{ComposedSegmentedLoadWriteStore}} always parallelizes iterations, even when the consumer is a single thread doing a blocking iteration like {{cache.keySet().forEach(...)}}. This will use lots of blocking threads, and will crowd out single-key cache operations, which are more sensitive to latency (because there are usually multiple single-key operations for each user request). It would be interesting to extend the persistence SPI so that the store knows when the user requested parallel iteration, but in the meantime it's safer to iterate over the segments in sequence.