From: drh <drh@noemail.net>
Date: Wed, 21 Dec 2016 21:26:58 +0000 (+0000)
Subject: Change the default lookaside configuration from 500 slots of 128 bytes each to 125... 
X-Git-Tag: version-3.16.0~29
X-Git-Url: http://git.ipfire.org/?a=commitdiff_plain;h=cdfffed7902b801004b3298946875f224d3e9cf5;p=thirdparty%2Fsqlite.git

Change the default lookaside configuration from 500 slots of 128 bytes each to 125 slots of 512 bytes each.  This uses the same amount of memory (64,000 bytes) but seems to perform much better in test applications.

FossilOrigin-Name: 52a12e47de88744187bd1c71f2820885cde414a8
---

diff --git a/manifest b/manifest
index 5b732bb567..8581a80890 100644
--- a/manifest
+++ b/manifest
@@ -1,5 +1,5 @@
-C Simplifications\sto\sthe\sway\sUnpackedRecord\sobjects\sare\sallocated.\s\sSmaller\nand\sfaster\scode\sthat\salso\sfixes\sa\ssubtle\s(currently\sunreachable)\sbug.
-D 2016-12-21T19:45:54.698
+C Change\sthe\sdefault\slookaside\sconfiguration\sfrom\s500\sslots\sof\s128\sbytes\seach\sto\s125\sslots\sof\s512\sbytes\seach.\s\sThis\suses\sthe\ssame\samount\sof\smemory\s(64,000\sbytes)\sbut\sseems\sto\sperform\smuch\sbetter\sin\stest\sapplications.
+D 2016-12-21T21:26:58.399
 F Makefile.in 41bd4cad981487345c4a84081074bcdb876e4b2e
 F Makefile.linux-gcc 7bc79876b875010e8c8f9502eb935ca92aa3c434
 F Makefile.msc b8ca53350ae545e3562403d5da2a69cec79308da
@@ -345,7 +345,7 @@ F src/expr.c c7c11fbe8bd4d27d04f1370efcce5a05b4fca229
 F src/fault.c 460f3e55994363812d9d60844b2a6de88826e007
 F src/fkey.c 2e9aabe1aee76273aff8a84ee92c464e095400ae
 F src/func.c 43916c1d8e6da5d107d91d2b212577d4f69a876a
-F src/global.c 235021a21ee2cb52b304589f8f9e85a36bbe24fa
+F src/global.c dcdb89f30b7aa531c5660030af106bc5bc48ef2e
 F src/hash.c 63d0ee752a3b92d4695b2b1f5259c4621b2cfebd
 F src/hash.h ab34c5c54a9e9de2e790b24349ba5aab3dbb4fd4
 F src/hwtime.h 747c1bbe9df21a92e9c50f3bbec1de841dc5e5da
@@ -1539,7 +1539,7 @@ F vsixtest/vsixtest.tcl 6a9a6ab600c25a91a7acc6293828957a386a8a93
 F vsixtest/vsixtest.vcxproj.data 2ed517e100c66dc455b492e1a33350c1b20fbcdc
 F vsixtest/vsixtest.vcxproj.filters 37e51ffedcdb064aad6ff33b6148725226cd608e
 F vsixtest/vsixtest_TemporaryKey.pfx e5b1b036facdb453873e7084e1cae9102ccc67a0
-P 165c044686212fbf7182dd560ad1e57eb4cc9838
-R 4dcc327309935c00dd451588970c060d
+P f7ab01f254cd9d7006b8dec29adb234a671b8e6f
+R 410ebc8fd4cf49ee7979c021d6ce32fb
 U drh
-Z 2858688c4db6360d8c3b1c8fd6aab8f2
+Z 1212e279b84c412f5a6bde29137a4a85
diff --git a/manifest.uuid b/manifest.uuid
index 74b572aeb8..cd272525c9 100644
--- a/manifest.uuid
+++ b/manifest.uuid
@@ -1 +1 @@
-f7ab01f254cd9d7006b8dec29adb234a671b8e6f
\ No newline at end of file
+52a12e47de88744187bd1c71f2820885cde414a8
\ No newline at end of file
diff --git a/src/global.c b/src/global.c
index 46f04d9fd9..ff6c7dba52 100644
--- a/src/global.c
+++ b/src/global.c
@@ -181,8 +181,8 @@ SQLITE_WSD struct Sqlite3Config sqlite3Config = {
    SQLITE_ALLOW_COVERING_INDEX_SCAN,   /* bUseCis */
    0x7ffffffe,                /* mxStrlen */
    0,                         /* neverCorrupt */
-   128,                       /* szLookaside */
-   500,                       /* nLookaside */
+   512,                       /* szLookaside */
+   125,                       /* nLookaside */
    SQLITE_STMTJRNL_SPILL,     /* nStmtSpill */
    {0,0,0,0,0,0,0,0},         /* m */
    {0,0,0,0,0,0,0,0,0},       /* mutex */