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caddy/rlimit_posix.go
2017-08-08 23:00:35 -06:00

23 lines
573 B
Go

// +build !windows,!plan9
package caddy
import (
"fmt"
"syscall"
)
// checkFdlimit issues a warning if the OS limit for
// max file descriptors is below a recommended minimum.
func checkFdlimit() {
const min = 8192
// Warn if ulimit is too low for production sites
rlimit := &syscall.Rlimit{}
err := syscall.Getrlimit(syscall.RLIMIT_NOFILE, rlimit)
if err == nil && rlimit.Cur < min {
fmt.Printf("WARNING: File descriptor limit %d is too low for production servers. "+
"At least %d is recommended. Fix with \"ulimit -n %d\".\n", rlimit.Cur, min, min)
}
}