Thanks Ged,

> The filesystem limits are up to your operating system. What is it?

Operating system is CentOS7 and 8. and the filesystem is zfs.

> The more random data that you give to ClamAV to scan,
> the bigger will be the risk of a false positive.

Thanks, I'll add this to consideration.

> You can find the man page for 'clamd.conf' on the ClamAV Website.
> Please read it, noting especially the warnings that it contains about
> changing some of the limits, and any part where it suggests that it is
> not a good idea to delete files just because ClamAV flags them.

OK, understood.

Kazunori