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Type: Enhancement
Resolution: Fixed
Priority: P3
Fix Version/s: 13
Affects Version/s: 8-shenandoah, 11-shenandoah, 13
Component/s: hotspot
Labels:
- gc-shenandoah

Subcomponent:
gc
Resolved In Build:
b24

Issue	Fix Version	Assignee	Priority	Status	Resolution	Resolved In Build
JDK-8225972	14	Aleksey Shipilev	P3	Resolved	Fixed	team

We can trim down the default number of GC threads to make Shenandoah more cooperative with the application and OS scheduler. We routinely trim down concurrent threads to 2..4 when deploying, and better default would make deployment stories simpler.

NB: ZGC sets 0.6*CPU for parallel and 0.125*CPU for concurrent threads.

backported by

JDK-8225972 Shenandoah: trim down default number of GC threads

Resolved

relates to

JDK-8231932 Shenandoah: conc/par GC threads ergonomics overrides user settings

Resolved

JDK-8233850 Shenandoah: Shenandoah thread count ergonomics should be container aware

Resolved

JDK-8240511 Shenandoah: parallel safepoint workers count should be ParallelGCThreads

Resolved

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Assignee:: Aleksey Shipilev

Reporter:: Aleksey Shipilev

Votes:: 0 Vote for this issue

Watchers:: 1 Start watching this issue

Created:: 2019-06-04 02:01

Updated:: 2020-03-04 02:49

Resolved:: 2019-06-05 01:08

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