bb3b980dfd validation: drop maximum -dbcache (Sjors Provoost)
Pull request description:
Due to recent UTXO set growth, the current maximum value for `-dbcache` of 16GB is ~just months away from being~ insufficient (for those who wish to complete IBD with the UTXO set held in RAM).
This drops the limit. It also adds a warning that it's up to users to check that they have enough RAM.
Fixes#28249.
---
A previous version of this PR increased the maximum to 64GB. It also made startup abort if the value provided is too high, rather than quietly round it down. But this didn't get much support.
ACKs for top commit:
achow101:
ACK bb3b980dfd
tdb3:
ACK bb3b980dfd
BenWestgate:
crACK bb3b980dfd.
Tree-SHA512: 8515fff468c2387a0b04bd9523ab1df46d6325738588b7550fabddbb8624817a583d95b95ea246407f9f0ff3e43e760cf7334621bec6af79710176328528a3ef
The src/node/ directory contains code that needs to access node state
(state in CChain, CBlockIndex, CCoinsView, CTxMemPool, and similar
classes).
Code in src/node/ is meant to be segregated from code in
src/wallet/ and src/qt/, to ensure wallet and GUI
code changes don't interfere with node operation, to allow wallet and GUI code
to run in separate processes, and to perhaps eventually allow wallet and GUI
code to be maintained in separate source repositories.
As a rule of thumb, code in one of the src/node/,
src/wallet/, or src/qt/ directories should avoid
calling code in the other directories directly, and only invoke it indirectly
through the more limited src/interfaces/ classes.
This directory is at the moment
sparsely populated. Eventually more substantial files like
src/validation.cpp and
src/txmempool.cpp might be moved there.
fce9e065c1