V8js

V8 JS Attributes

Describes V8 JS Engine Runtime related attributes.

Attributes:

Key	Stability	Value Type	Description	Example Values
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
v8js.resource.type		string	The type of resource keeping the event loop active.	Immediate; TCPServerWrap; TCPWrap

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

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).

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.

v8js.resource.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
Immediate	Active setImmediate callbacks.
TCPServerWrap	Active TCP Servers.
TCPWrap	Active TCP connections.
Timeout	Active setTimeout or setInterval timers.
TTYWrap	Active Terminal I/O (stdin/stdout).