On 1 December 2017 at 11:49, hw <hw at gc-24.de> wrote: > > Hi, > > isn´t this weird: > > > # time foo > real 43m39.841s > user 15m31.109s > sys 0m44.136s > This is counting the CPU time that a process used. If something is not in 'CPU' but waiting on input etc it might not get counted in user or sys. There is also the fact that the builtin bash time command you used calculates things differently from the /usr/bin/time command. >From the /usr/bin/time man page Note: some shells (e.g., bash(1)) have a built-in time command that provides less functionality than the command described here. To access the real command, you may need to specify its pathname (something like /usr/bin/time). >From the bash man page When the shell is in posix mode, time may be followed by a newline. In this case, the shell displays the total user and system time consumed by the shell and its children. The TIMEFORMAT variable may be used to specify the format of the time information. The built in time is actually meant to be used with measuring pipeline information but can be used by itself > > Almost 30 minutes have disappeared, but it actually took about that long, > so what happened? > _______________________________________________ > CentOS mailing list > CentOS at centos.org > https://lists.centos.org/mailman/listinfo/centos -- Stephen J Smoogen.