If i were you i would split my power between at least 2 or 3 mining pools. Just to be on the safe side.

Concerning middlecoin you should consider pointing some power on the eu server which is more stable if you are leaving in EU and since it's mining only doge for now will be quickly converted and stacked on your balance.

I hope that your electricity is cheap because 160 Mh/s should be rather expensive !!!

Or maybe you can share with us your asic scrypt mining hardware 

Not a valid argument. To get 150 Mh/s, there has to be an investment of close to $75-100k.  So his return is obviously expected to be higher than a setup that costs 100x less.

cause it's switching coins ever so often.

Thanks for the one theory. Is it switching a lot more often than in the past, because these rates are also consistently slower compared to past rates I have achieved day in/out on middle coin.

I am reposting my original question below, because I had the speeds posted wrong in my original post, and I didn't want people to be shocked by such high numbers:

Does anyone know why I would be getting roughly 150-250 KH/s slower (per machine) on middlecoin than I do from any other pool?

I would like to mine here, but with three machines, this is making a difference of about 600 KH/s that appears to be going nowhere.

If I had a reasonable explanation for this, I'd probably choose to continue mining here, as it has generally been good to me (THANKS, H2O!).

I have been noticing this for the last five days or so.

Every time the coin switches, cgminer will pause for a few seconds and discard the work it was doing on the old coin, so those hashes don't get counted.

There is also the issue that the stratum mining protocol isn't set up for changing coins on the same pool. The pool has to reset the connection, and cgminer sees this as a network problem, and will stop mining, or change to another pool.

The problem is that middlecoin is changing coin every 30-45 seconds, so when cgminer goes idle for 5 seconds after a coin change, it makes a big overall impact.



You can see this happening in this monitor screenshot from my mines. The orange hash rate charts are middlecoin, and you can see the pauses every time the coin changes. For comparison the blue and red charts are different pools, and you can see the highly consistent hashrates. You can also see how the coin change affects all the mines simultaneously.

What do you mean by "updates are not updating"? My miners are currently mining at 2.4MH/s but your tool has been showing 1.4 MH/s for me ever since I tried it some 30 minutes ago. Is that what you mean? That this 1.4MH/s is some stale number from a couple of hours ago? Thanks!

You can see what time (in UTC time) the last update occurred to determine if it's stale or not. It shows what time it last updated in the chart.

I don't know if coin switching alone will account for the rejects. From what I have seen, when the coin changes, cgminer simply discards the work it was doing, and doesn't count it as a reject.

Rejects tend to occur when the work is received too late. I find that this happens most often when mining very "fast" coins. Mining litecoin, which has a 2.5 minute block time, I get about 3% rejects, mining DOGE with a 1 minute block, I get about 4%, for something like casinocoin with a 30 sec block, I get about 7%, and for something like fastcoin, I get over 20% rejects. A slow or laggy internet connection (e.g. a 3G connection, which frequently has a ping time in the 2000 ms range) can make this problem a lot worse.

The same problem can occur when a huge pool switches onto a small coin, and the block rates go way out of spec before the difficulty readjusts.

I haven't noticed middlecoin mining any very fast or very small coins. At the moment its flip-flopping between litecoin, dogecoin and megacoin every few seconds, but I'm not getting more rejects that I normally get. However, my miners keep failing over onto the EU server several times per hour, presumably because there are too many coin switches and disconnects.

Thank you for the quick answer, Test User. It just seems strange all my numbers across three machines are so out of whack from where they were six days ago (and only on middle coin servers). H20, forgive me if you have already addressed this problem previously, but is this an issue your server upgrades are going to address?