On 04/21/2018 04:38 AM, Ram wrote:
There is no IO load running everything in /dev/shm

You can verify your claim by running vmstat(8), such as in:

  vmstat 20 20

(20 times for 20 seconds each time)

You might be surprised how much file system activity there is, even when you put all of PostFix's files in /dev/shm. For example, are all of PostFix's binaries in /dev/shm? How about the modules loaded by PostFix?

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