Identify the most stable version of rocksdb above v7.5, and upgrade the current rocksdb to that version.

Tune the parameters in rocksdb compilation. Read the following file to see the current rocksdb compilation setup https://github.com/computecoin-network/Olympus/blob/a223fb6384d0a38269f0c02b2fe42906c0395bc8/README.md

Tune the parameters in the following functions. https://github.com/computecoin-network/Olympus/blob/a223fb6384d0a38269f0c02b2fe42906c0395bc8/mcp/db/database.cpp#L78 https://github.com/computecoin-network/Olympus/blob/a223fb6384d0a38269f0c02b2fe42906c0395bc8/mcp/db/database.cpp#L398

Make sure the database has a good performance on reading and writing. Test the performance in different configurations and record the result.