Commit 01ec256

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Simplify tape block format.

No more indirect blocks. The blocks form a linked list instead. This saves some memory, because we don't need to have a buffer in memory to hold the indirect block (or blocks). To reflect that, TAPE_BUFFER_OVERHEAD is reduced from 3 to 1 buffer, which allows using more memory for building the initial runs. Reviewed by Peter Geoghegan and Robert Haas. Discussion: https://www.postgresql.org/message-id/34678beb-938e-646e-db9f-a7def5c44ada%40iki.fi

1 parent b86515d commit 01ec256Copy full SHA for 01ec256

3 files changed

+218

-478

lines changed

src
- backend/utils/sort
  - logtape.c
  - tuplesort.c
- include/utils
  - logtape.h

3 files changed

+218

-478

lines changed

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