Security update of the network is scheduled on August 8. We are asking mainnet validators to schedule time for the maintenance.

Note, that update will not be activated immediately after node software upgrade. Instead, to preserve consensus all the time, update will be triggered by acceptance of new network config.

Therefore the whole process will require from you
1) Update your validator node
2) Wait till synchronization restores
3) Voting for new config
The order of actions is primary important.

Besides improving the security, this update contains node stability and memory consumption improvements, speed up of access to database and enhancing stats.