Something is wrong again?

https://www.reddit.com/r/ethereum/comments/5efqr9/attention_miners_please_raise_the_gas_limit/

In order to more quickly facilitate the "debloating" of the blockchain, please raise the gas limit and target gas floor to 3.3 million and resume accepting transactions if you have stopped. There has been no DoS attacks for the last 4 weeks so the risks associated with following these recommendations are reduced.

geth Mining

targetgaslimit 3300000 --gasprice 20000000000
Parity Mining

--gas-floor-target 3300000 --gasprice 20000000000
Simply put, the blockchain "debloating" is removing empty accounts from the Ethereum blockchain. EIP 161 that makes it possible to remove a large number of empty accounts that were put in the state at very low cost as a result of earlier DoS attacks. With this EIP, ’empty’ accounts are removed from the state whenever ‘touched’ by another transaction. Removal of the empty accounts greatly reduces blockchain state size, which will provide client optimizations such as faster sync times. The actual removal process will begin after the fork by systematically performing CALL to the empty accounts that were created by the attacks. Increasing the gas limit will allow for more transactions that CALL empty accounts.

A blog post by /u/vbuterin describing uncle rates and transaction fees when mining can be found here. It concludes that accepting transactions with a gas price of 20000000000 as suggested in this post is fairly close to optimal.

More information about the Spurious Dragon hard fork and the EIPs involved (including EIP 161) can be found here.