VictoriaMetrics/lib/memory/memory_linux.go
Aliaksandr Valialkin 6721e47ae9 app: respect CPU limits set via cgroups
Update GOMAXPROCS to limits set via cgroups. This should reduce CPU trashing and reduce memory usage
for cases when VictoriaMetrics components run in containers with CPU limits.

See https://github.com/VictoriaMetrics/VictoriaMetrics/issues/685
2020-08-11 23:01:03 +03:00

27 lines
626 B
Go

package memory
import (
"syscall"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/cgroup"
"github.com/VictoriaMetrics/VictoriaMetrics/lib/logger"
)
const maxInt = int(^uint(0) >> 1)
func sysTotalMemory() int {
var si syscall.Sysinfo_t
if err := syscall.Sysinfo(&si); err != nil {
logger.Panicf("FATAL: error in syscall.Sysinfo: %s", err)
}
totalMem := maxInt
if uint64(maxInt)/uint64(si.Totalram) > uint64(si.Unit) {
totalMem = int(uint64(si.Totalram) * uint64(si.Unit))
}
mem := cgroup.GetMemoryLimit()
if mem <= 0 || int64(int(mem)) != mem || int(mem) > totalMem {
return totalMem
}
return int(mem)
}