semantic-conventions/docs/attributes-registry/v8js.md

V8js

V8 JS Attributes

Describes V8 JS Engine Runtime related attributes.

Attribute	Type	Description	Examples	Stability
v8js.gc.type	string	The type of garbage collection.	major; minor; incremental
v8js.heap.space.name	string	The name of the space type of heap memory. [1]	new_space; old_space; code_space

[1] v8js.heap.space.name: Value can be retrieved from value space_name of v8.getHeapSpaceStatistics()

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v8js.gc.type has the following list of well-known values. If one of them applies, then the respective value MUST be used; otherwise, a custom value MAY be used.

Value	Description	Stability
incremental	Incremental (Incremental Marking).
major	Major (Mark Sweep Compact).
minor	Minor (Scavenge).
weakcb	Weak Callbacks (Process Weak Callbacks).

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v8js.heap.space.name has the following list of well-known values. If one of them applies, then the respective value MUST be used; otherwise, a custom value MAY be used.

Value	Description	Stability
code_space	Code memory space.
large_object_space	Large object memory space.
map_space	Map memory space.
new_space	New memory space.
old_space	Old memory space.