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UpdateTip: new best=0000000027effeeafbf56c6c9de19f7d8f5b96227b2b4e85c6f6033220866f0d height=221 log2_work=39.298291 tx=46374 date=2015-11-06 12:02:46 progress=1.000000 cache=3.0MiB(10114tx)
What is the significance of cache=3.0MB in above mentioned UpdateTip log drom debug.log ?
It's describing how much of the allocated UTXO cache you are using. You can adjust how much maximum memory Bitcoin Core uses for this and others with the dbcache parameter, the higher the limit in megabytes the higher the performance to a certain degree.
