I will be glad to know, if there is some reason to give 32G or more RAM for solo mining on qt-wallet.
Give it me more chance to find a block?
Was already answered before many times. For example:
Why just stuck 2.4 gb memory? how the settings in the command to increase Ram is more widely used? Help !

did you set "minermemory"?
anyway, increasing miner ram over 1gb is (again) giving very little hashrate increase and (again) much higher risk of orphans, so just avoid it.