sqlite: Remove custom PRAGMA auto_vacuum_slack_pages.
SQLite patch 0007-Allow-auto-vacuum-to-work-with-chunks.patch
introduces a PRAGMA that is not used outside of tests. The PRAGMA was
added for an experiment that was discontinued, referenced on the bug
above.
This CL removes the patch and the associated tests, reducing the total
amount of patches we carry on top of SQLite.
No functional changes are expected, because the patch is inert in
production. Specifically, the newly introduced autoVacuumSlack member of
the BtShared structure is zero-initialized by default, and can only be
changed by issuing the auto_vacuum_slack_pages PRAGMA. The new btree
code is gated by an if (... && pBt->autoVacuumSlack). The PRAGMA is not
used outside of testing.
Bug: 698010
Change-Id: Id2a40badccb96389c6ff9ce1780ffa703dedce6c
Reviewed-on: https://chromium-review.googlesource.com/c/1362222
Reviewed-by: Chris Mumford <cmumford@chromium.org>
Commit-Queue: Victor Costan <pwnall@chromium.org>
Cr-Original-Commit-Position: refs/heads/master@{#613782}
Cr-Mirrored-From: https://chromium.googlesource.com/chromium/src
Cr-Mirrored-Commit: 4f03013104e9848b0c0d6ca0c0fdbd2c3041039517 files changed
