G
gus bjorklund
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> On Aug 12, 2019, at 10:46 AM, George Potemkin wrote: > > While db is still running then the file handles are still opened. In this case the umount command will not dismount a disk but the command will empty system cache first. At least it's true on HP-UX but I guess on other Unix flavors as well. > > > that behaviour must be o/s and filesystem specific and is not documented. there's a force option on umount() system call. to flush, on linux, one can do echo 1 > /proc/sys/vm/drop_caches to flush /all/ filesystem caches without disturbing system otherwise. that is a bit drastic though (but cant be worse than sync() (or can it?)).=
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