[IGNITE-6182] Change default max memory size from 80% to 20%

• Type: Task
• Status: Resolved
• Priority: Blocker
• Resolution: Fixed
• Affects Version/s: 2.1
• Fix Version/s: 2.2
• Component/s: general
• Assignee: Igor Seliverstov
• Reporter: Vladimir Ozerov
• Created: 24/Aug/17 17:18
• Updated: 02/Aug/19 11:02
• Resolved: 01/Sep/17 09:58

Description

Currently we can allocate up to 80% of available RAM by default. It could lead to swap with potential risk of hang.

In order to improve user experience, we need to do the following:
1) Decrease default to 20% (MemoryConfiguration.DFLT_MEMORY_POLICY_FRACTION)
2) When node starts it should sum max sizes of all memory regions plus Java's XMX. If result is greater than 50% of total RAM, we should issue a warning about potential swap.

Issue Links

• is duplicated by: IGNITE-6003 Detecting low memory on ignite node startup
• links to: devlist
• links to: GitHub Pull Request #2535
• links to: GitHub Pull Request #2574
• links to: GitHub Pull Request #2574
• links to: TC run
• links to: TC run [master]