I'm playing around with a large H2 data set.The db in question is 40gb+, 
the table has 300 million records.+ Via JDBC.

When I do a simple  "select * from mylargetable" it takes 10-15 minute 
before I see the first row, and the data starts flowing. 

This was unexpected as H2 has been extremely performant in all other 
situations.

Is there something I can do to reduce this Time To First Row? If I add a 
limit on the query, the results start comming back faster, ex limit 10000 
comes back sub second, 1000000 comes back in a few seconds, etc... The TTFR 
keeps growing as the limit increases.

Is H2 trying to fully fill some buffer before starting to return data?



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