[AURORA-52] Track percentile stats about replicated log write latency

• Type: Story
• Status: Resolved
• Priority: Minor
• Resolution: Later
• Component/s: Scheduler
• Labels: O3
• Assignee: Unassigned
• Reporter: Bill Farner
• Created: 17/Jan/14 09:36
• Updated: 28/Dec/15 02:57
• Resolved: 28/Dec/15 02:57

Description

We currently track the aggregate log append write latency, but this doesn't tell the whole story. We've encountered situations in production where kernel and disk issues can lead to a long tail of high latency appends, which are buried in the aggregate.

Issue Links

• is blocked by: AURORA-118 Add percentiles to @Timed, or write a new decorator to add percentiles
• is duplicated by: AURORA-73 Break out storage latency and log latency into percentiles