Speedup 2PC recovery by skipping two phase state files in normal path

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2PC state info held in shmem at PREPARE, then cleaned at COMMIT PREPARED/ABORT PREPARED,
avoiding writing/fsyncing any state information to disk in the normal path, greatly enhancing replay speed.
Prepared transactions that live past one checkpoint redo horizon will be written to disk as now.
Similar conceptually to 978b2f65aa and building upon
the infrastructure created by that commit.

Authors, in equal measure: Stas Kelvich, Nikhil Sontakke and Michael Paquier
Discussion: https://postgr.es/m/CAMGcDxf8Bn9ZPBBJZba9wiyQq-Qk5uqq=VjoMnRnW5s+fKST3w@mail.gmail.com

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This commit is contained in:

Simon Riggs

2017-04-04 15:56:56 -04:00

parent 60a0b2ec89

commit 728bd991c3

4 changed files with 564 additions and 320 deletions

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849

src/backend/access/transam/twophase.c

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