b3fd806db7
This change implements an experiment to preload the database prior to opening any file handles. This resolves a conflict with Windows exclusive file mode, which was being blocked by base::PreRead's separate handle used for preloading. All Databases for which the owner calls Database::Preload() are included in the study. This CL implements an experimental feature to preload the database before any handles are opened. Bug: 40904059 Change-Id: Ice9dcf730f71f5e4a6af6fd2290b9588a7e0a03a Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/6269958 Reviewed-by: Reilly Grant <reillyg@chromium.org> Reviewed-by: Tsuyoshi Horo <horo@chromium.org> Reviewed-by: Austin Sullivan <asully@chromium.org> Reviewed-by: Chris Fredrickson <cfredric@chromium.org> Reviewed-by: Sophie Chang <sophiechang@chromium.org> Reviewed-by: Mikel Astiz <mastiz@chromium.org> Reviewed-by: Greg Thompson <grt@chromium.org> Reviewed-by: Robert Ogden <robertogden@chromium.org> Commit-Queue: Etienne Bergeron <etienneb@chromium.org> Cr-Commit-Position: refs/heads/main@{#1422031}
22 lines
608 B
C++
22 lines
608 B
C++
// Copyright 2018 The Chromium Authors
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "sql/sql_features.h"
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#include "base/feature_list.h"
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namespace sql::features {
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// Enable WAL mode for all SQLite databases.
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BASE_FEATURE(kEnableWALModeByDefault,
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"EnableWALModeByDefault",
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base::FEATURE_DISABLED_BY_DEFAULT);
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// Preload database before opening the file.
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BASE_FEATURE(kPreOpenPreloadDatabase,
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"PreOpenPreloadDatabase",
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base::FEATURE_DISABLED_BY_DEFAULT);
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} // namespace sql::features
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