For tables with Blob or Clob columns, the default page size for the will
be 32 kB.
(Ref. http://db.apache.org/derby/docs/dev/tuning/ctunperf816059.html )
--
Øystein
Anders Morken wrote:
Anders Morken:
[...] the page size (Seemed to be 32K in this case [...]
Aha. Those 32 kilobyte pages were "overflow pages", created to hold
rows that won't fit on a regular page. The regular pages were 4
kilobytes, the default size, but obviously those 6 megabyte blobs had
to be split across a few overflow pages. =)
That explains why blob workloads suddenly consume a lot more memory than
regular workloads with few (if any) overflow pages. Maybe this is
common knowledge, but I just hadn't realized. =)
Sorry for the noise, just wanted to clear up (my own) confusion. =)
