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IIRC from the release notes of Bitcoin Core v29.0 the limit of max. 16GiB for dbcache has been lifted or rather removed. If you have enough RAM you could set more than 16GiB with the latest version of Core.
Noted! Thanks… I did skimmed through the release note earlier for it , must have missed it..
Just wondering if 64GiB wasn’t enough for a fast IBD process.
Depending on what your device is used for where your node runs, choose a reasonable value for dbcache, i.e. leave some RAM for OS and other processes and don't force your OS into constant paging to swap as this will grind down your device's performance to a halt. Nobody will be happy with a lot of paging to swap space.
Current space use by my full node on an Ubuntu Linux box:
694GiB .bitcoin/blocks
12GiB .bitcoin/chainstate
68GiB .bitcoin/indexes
360MiB .bitcoin/wallets
774GiB .bitcoin/
Great! around 800GiB in total..