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Lots of rejected shares.
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Topic: Lots of rejected shares. (Read 6029 times)
orcalvr64
(OP)
Newbie
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Activity: 7
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Lots of rejected shares.
July 12, 2011, 09:51:49 PM
#1
Ever since I updated GUIminer, now that it uses phoenix, I have been getting a high number of rejected shares. Over the past 10 hours I have 59 accepted and 245 rejected. I can't figure out what is causing this bad ratio of accepted to rejected. I have an ATI Radeon 4670 running windows 7.The extra flags are worksize=32 and aggression=5. If you need anymore information let me know.
dikidera
Full Member
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Activity: 126
Merit: 100
⇾
Re: Lots of rejected shares.
July 12, 2011, 11:26:22 PM
#2
Probably because the GPU is slow and by the time it submits a share, it counts it as old. As to why you didn't have this problem before, i have no answer to that. Switch back to the older version then.
iopq
Hero Member
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Activity: 658
Merit: 500
Re: Lots of rejected shares.
July 13, 2011, 12:12:11 PM
#3
Quote from: dikidera on July 12, 2011, 11:26:22 PM
Probably because the GPU is slow and by the time it submits a share, it counts it as old. As to why you didn't have this problem before, i have no answer to that. Switch back to the older version then.
I'm running a backup pool with f=60 and a primary pool at f=30
the backup pool is running at 2.7Mhash/s and has 119 accepted and 1 stale
nob
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Re: Lots of rejected shares.
July 13, 2011, 01:08:10 PM
#4
Same Problem here with phoenix and 4670.
Use poclbm or DiabloMiner instead.
Phoenix 1.5 / GuiMiner with Phoenix ~50-80% stales
poclbm atm <1%
Tested it with Ubuntu 11.04 SDK 2.1 , Ubuntu with SDK 2.4 and Windows 7 with 2.4. Everytime phoenix seems broken.
HD 6970 in the same machines with phoenix are ok (<1% stales)
jedi95
Full Member
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Merit: 120
Re: Lots of rejected shares.
July 13, 2011, 03:56:09 PM
#5
Are you mining on a pool with long polling?
If not, then that explains things. Phoenix doesn't have an askrate by default, so without long polling slow miners end up wasting a ton of time on stale work. The fix is to alter the command line to use an askrate.
example:
-u
http://name:password@pool.com:8332/;askrate=10
This would set an askrate of 10 seconds.
I'm not sure how to do this in GUIminer though.
Phoenix Miner
developer
Donations appreciated at:
1PHoenix9j9J3M6v3VQYWeXrHPPjf7y3rU
nebiki
Sr. Member
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Activity: 742
Merit: 250
Re: Lots of rejected shares.
July 13, 2011, 10:33:04 PM
#6
Quote from: jedi95 on July 13, 2011, 03:56:09 PM
Are you mining on a pool with long polling?
If not, then that explains things. Phoenix doesn't have an askrate by default, so without long polling slow miners end up wasting a ton of time on stale work. The fix is to alter the command line to use an askrate.
example:
-u
http://name:password@pool.com:8332/;askrate=10
This would set an askrate of 10 seconds.
I'm not sure how to do this in GUIminer though.
i thought askrate is the work queue size (-q). this probably wouldn't help his stales. i'd get a different card anyway, 4670 is way too inefficient. i don't think new optimized miners support the hd4xxx series anyway. if your old guiminer worked fine, use that instead. your tweaking a few hashes out of your card won't make it efficient.
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grue
Legendary
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Activity: 2058
Merit: 1432
Re: Lots of rejected shares.
July 13, 2011, 10:50:49 PM
#7
i think running 2 instances of a miner increases stales dramatically. you really dont need to do it, just have a pool monitoring script
It is pitch black. You are likely to be eaten by a grue.
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orcalvr64
(OP)
Newbie
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Activity: 7
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Re: Lots of rejected shares.
July 13, 2011, 11:28:42 PM
#8
Thanks for all the help guys I just switched back to the old miner and that fixed the problem. I've been planning on getting a new GPU for better mining anyway, but probably not for a while. The two Mh/s increase isn't worth all the stale shares.
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