Buffer Requests Trace

I changed the buffer manager code in order to generate a trace of page requests from the buffer manager perspective. In summary, whenever ReleaseBuffer() or ReleaseAndReadBuffer() are called, I print the page currently being released which is identified by the tuple (tableSpace, dbNode, relationNode, blockNumber).

I am now running a tpcc benchmark from http://oltpbenchmark.com/

Initially I create and load the database with a scale factor of 64. This sums up to a database of around 6.7GB (~ 800k pages). Then I execute the tpcc benchmark for 1 minute with only 1 terminal. Finally I analyse the trace of the buffer requests made by the execution of the benchmark only (creation and loading not considered).

Unfortunately, in the generated trace with over 2 million buffer requests, only ~14k different pages are being accessed, out of the 800k of the whole database. Am I missing something here?

Best regards.
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Lucas Lersch