[IGNITE-12442] Fix unnecessary synchronized on PagesCache#add.

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 2.7.6
• Fix Version/s: 2.8, 2.9
• Component/s: data structures
• Assignee: Evgeny Stanilovsky
• Reporter: Evgeny Stanilovsky
• Created: 13/Dec/19 10:35
• Updated: 24/Dec/19 08:10
• Resolved: 20/Dec/19 11:21

Description

After IGNITE-6930 was implemented, there are some synchronization extra usage found.
1. org.apache.ignite.internal.processors.cache.persistence.freelist.PagesList.PagesCache#add
2. org.apache.ignite.internal.processors.cache.persistence.freelist.PagesList.PagesCache#emptyFlushCnt

hope need to fix it.

Issue Links

• is caused by: IGNITE-6930 Optionally to do not write free list updates to WAL
• links to: GitHub Pull Request #7147