[TS-4719] Should have NUMA affinity for disk threads (AIO threads)

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 6.2.1, 7.0.0
• Component/s: Cache, Core
• Assignee: Phil Sorber
• Reporter: Leif Hedstrom
• Created: 04/Aug/16 23:37
• Updated: 07/Nov/16 23:25
• Resolved: 16/Aug/16 22:14

Description

We should properly interleave AIO threads (disk threads) evenly across the NUMA nodes, and have affinity on those nodes. That would allow for better memory distribution across NUMA nodes. We've noticed pretty uneven allocations on some boxes, which I attribute to this problem (but no strong evidence, but it does make sense).

Per-node process memory usage (in MBs) for PID 33471 ([ET_NET 0])
                           Node 0          Node 1           Total
                  --------------- --------------- ---------------
Huge                         0.00            0.00            0.00
Heap                         0.00            0.00            0.00
Stack                        1.38            0.64            2.02
Private                 188993.75        59142.80       248136.55
----------------  --------------- --------------- ---------------
Total                   188995.13        59143.44       248138.57

Issue Links

• is duplicated by: TS-1965 Make IO threads NUMA aware
• links to: GitHub Pull Request #868
• links to: GitHub Pull Request #1170