pete pot:
>
>
> This may not be exactly a Postfix question, but related...
> I have noticed that when there are a lot of emails in the deferred queue and
> i use 'postqueue -f' to send them all, vmware virtual servers
>
> are incredible much faster than physical servers!!
You say both servers run off SSD and have plenty memory. Remaining
differences:
- Your VMM cheats, by disabling SYNCHRONOUS UPDATES of the virtual
disk. This means you lose mail when the host OS crashes. Postfix
requires that fsync returns after the data is stored. With caching
in host memory, fsync returns while the data sits in host memory.
- Your OS in the VM has atime updates disabled, and the physicsal
host not.
Or a combination of the above.
Wietse
