[gentoo-user] a question about emerge --sync

[behrouz khosravi]

Hello everybody.
I have a little bandwidth problem. I don't want to update my packages
very frequently.
Is it save to sync my portage not very often, say every month or two,
so when I install something I wont be warned that some of my packages
are outdated?
In this manner I wont need to mask my packages, to prevent them from
updating, right ?

Thanks.