Does Dynatrace Managed define O_DIRECT for disk access?

[AntonioSousa]

I have a situation in a Dynatrace Managed server where the buff column in vmstat shows very low values, and sometimes even zero.

One possible explanation might be Dynatrace defining O_DIRECT, so that the kernel does not buffer its disk access. Does someone know if that is the case?

[ChadTurner]

@AntonioSousa were you able to get clarity on the buffer issue?