Events should be chucked

[kianenigma]

All events are stored under a single key. retrieving this potentially huge blob of data for cases such as account creation in genesis, or other potentially blocks that are bloated with lots of events, is a rocksdb killer; events should be chucked into smaller maps of vectors. See the elections pallet for a reference of this.

[bkchr]

#5463

I think this is the better solution.

[kianenigma]

I know about the PR but from the internal discussion I understood that we want the chunking as well anyhow. Maybe I misunderstood?

[kianenigma]

related #2619

[bkchr]

I still don't see how this should improve the performance. This increases the amount of storage accesses and we will not see 100k events.

[kianenigma]

Yeah this issue is subject to doubt. Yet I think the implementation of the abstraction is good feature to provide anyhow.

[bkchr]

The abstraction is a completely different topic^^