My bandwidth and cpu are ok, based on that i could run 300 threads. My proxies are with unlimited bandwidth so this is not a problem. Also my provider gives me fresh proxies every month.
Running 300 threads with 10 proxies probably isn't going to be a good idea. That's probably going to end up getting your proxies I.P. banned pretty quickly. Why not bump it up to 20-30 or even 50 threads, but 300 is way overkill. I have 110 private proxies and I haven't pushed it over 200 threads because I haven't needed to. I'm sure easily can but there really hasn't been any need.
As a matter of fact since all the optimizations lately I've been running it at 50 threads and I'm getting a ton of links every day.
Just to clarify my earlier post, unlimited bandwidth and unlimited connections are not the same thing. I use providers that offer max 10 connections per proxy, and another that has max 100 connections per account (regardless of number of proxies in an account).
On top of that, even ignoring these restrictions, a proxy is just an assigned IP on a VPS, and said vps has a maximum throughput, so if you have 30 proxies running off of 1 vps sharing a 100Mbit port, you wont increase processing by increasing threads (for clarity, this refers to your proxy providers use of VirtualPrivateServers, not your vps)
In short ask your proxy provider for all these details.
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As a matter of fact since all the optimizations lately I've been running it at 50 threads and I'm getting a ton of links every day.
I'd start with 20 and go up from there.
You're welcome.