[IGNITE-7380] Avoid updating PagePartitionCounters in case all counters were not modified

• Type: Improvement
• Status: Resolved
• Priority: Critical
• Resolution: Fixed
• Fix Version/s: 2.4
• Component/s: persistence
• Assignee: Dmitry Pavlov
• Reporter: Dmitry Pavlov
• Created: 10/Jan/18 17:21
• Updated: 30/Jan/18 14:14
• Resolved: 17/Jan/18 12:59

Description

PagePartitionCountersIO ignores actual values of counters and marks pages dirty even if partition has no counters update.

This leads to PAGE_RECORD creation for pages from PagePartitionCountersIO

and as result with pages from TrackingPageIO.

These modificaiton may be skipped if counters are checked for equality before storing data.

Issue Links

• is related to: IGNITE-7507 Ignite node performance drop during checkpoint start: store metapage eviction causes long checkpoint lock hold time
• links to: GitHub Pull Request #3354
• links to: GitHub Pull Request #3365