memory

func GetLiveDatasetSize ¶

func GetLiveDatasetSize() uint64

GetLiveDatasetSize returns the live dataset size in bytes which required by calculating GOGC since go1.19,

gcPercentHeapGoal = c.heapMarked + (c.heapMarked+c.lastStackScan.Load()+c.globalsScan.Load())*uint64(gcPercent)/100

There are some metrics be added in go1.21 to accurately get `heapMarked` and `lastStackScan`, use `/gc/heap/live:bytes` metric as `heapMarked`, and use `/gc/scan/stack:bytes` metric as `lastStackScan`

func GetMemoryFree ¶

func GetMemoryFree() uint64

GetMemoryFree returns memory free

func GetMemoryLimit ¶

func GetMemoryLimit() uint64

GetMemoryLimit returns system memory limit if cgroup is used, it returns cgroup memory limit