[CASSANDRA-14580] Make PeriodicCommitLogService.blockWhenSyncLagsNanos configurable

• Type: Improvement
• Status: Resolved
• Priority: Low
• Resolution: Fixed
• Fix Version/s: 4.0-alpha1, 4.0
• Assignee: Jason Brown
• Reporter: Jason Brown

Authors

Jason Brown

Reviewers

Jordan West

• Created: 21/Jul/18 06:23
• Updated: 15/May/20 08:04
• Resolved: 22/Jul/18 10:23

Description

When using the default values for periodic commitlog, the sync is every ten seconds and if there's a lad in flushing to disc, we can block for up to 15 seconds (sync time * 1.5). However, if you lower the sync time to 1 second, for example, the block time is only 1.5 seconds (not acceptable in all situations). Admittedly this is only an expert-level setting, but useful in some cases.