Hi,

I am running 2 database on the same MySQL server on one machine. When
running this configuration, I notice that the disk usage is very high. On
other hand, If run just one workload, the disk usage is very low. To be
certain, I ran 2 servers running 1 database each on different ports. I see
the same results with config too.

Just some numbers to clarify:
I ran "vmstat 1". The bi is ~4000 when running 2 databases while only ~500
when running 1 database.

Questions:
Does MySQL flush its cache or some internal memory everytime it executes a
query for another database?

Thanks,

Gokul

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