third_party/sqlite/patches/0002-Use-seperate-page-cache-pools-for-each-sqlite-connec.patch

From a5bfa4afd458372a73efed9b191a02c7b7c000c5 Mon Sep 17 00:00:00 2001
From: rmcilroy <rmcilroy@chromium.org>
Date: Thu, 20 Jun 2013 22:50:12 +0000
Subject: [PATCH 02/10] Use seperate page-cache pools for each sqlite
 connection.

Due to multiple different subsystems using sqlite, the shared global page
cache policy does not suite our use-cases on Chrome very well.  This CL
enables a compile time flag to be set to disable shared cache pools.

BUG=243769

Original review URL: https://chromiumcodereview.appspot.com/17413004
---
 third_party/sqlite/src/src/pcache1.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/third_party/sqlite/src/src/pcache1.c b/third_party/sqlite/src/src/pcache1.c
index 2692bd6ac9d3..c93294a9df71 100644
--- a/third_party/sqlite/src/src/pcache1.c
+++ b/third_party/sqlite/src/src/pcache1.c
@@ -689,6 +689,8 @@ static int pcache1Init(void *NotUsed){
   ** private PGroup (mode-1).  pcache1.separateCache is false if the single
   ** PGroup in pcache1.grp is used for all page caches (mode-2).
   **
+  **   *  Always use separate caches (mode-1) if SQLITE_SEPARATE_CACHE_POOLS
+  **
   **   *  Always use a unified cache (mode-2) if ENABLE_MEMORY_MANAGEMENT
   **
   **   *  Use a unified cache in single-threaded applications that have
@@ -698,7 +700,9 @@ static int pcache1Init(void *NotUsed){
   **
   **   *  Otherwise use separate caches (mode-1)
   */
-#if defined(SQLITE_ENABLE_MEMORY_MANAGEMENT)
+#ifdef SQLITE_SEPARATE_CACHE_POOLS
+  pcache1.separateCache = 1;
+#elif defined(SQLITE_ENABLE_MEMORY_MANAGEMENT)
   pcache1.separateCache = 0;
 #elif SQLITE_THREADSAFE
   pcache1.separateCache = sqlite3GlobalConfig.pPage==0
--
2.14.0