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Re: [HTCondor-users] slow creation of condor_shadow processes

Finally able to get the parameters due to which it was happening but didn't
understand why it's happening.

IIRC, HTCondor closes (almost?) all FDs after fork()ing* but before exec()ing the shadow. There was not, until relatively recently, a way to close all the FDs associated with a process; you had to make a system call for each FD. When you have to close 102,400 FDs, that's a lot of system calls, and it takes a while.

- ToddM

*: On Linux, HTCondor actually calls clone().