Enhance the "PRAGMA cache_spill" statement to accept an integer argument which

is the threshold at which spilling will begin.

FossilOrigin-Name: f79d264db24a470d1a4571e15a99cd3d68b5166c

diff --cc manifest
index 0565883d769995b9dc222778a32578f1cf48f02f,1b21bffde453f78f5fddfe786a88541eaa0002ac..06f06b267c64be9a60ed6a169a2e0befb7964964
--- 1/manifest
--- 2/manifest
+++ b/manifest
@@@ -1,5 -1,5 +1,5 @@@
- C Fix\sa\s#define\sin\sparse.y\sthat\sdisabled\sunused\scode\sin\sthe\sgenerated\sparser.
- D 2015-11-12T15:04:05.278
 -C Test\scases.\s\sMinor\sproblems\sfixed.\s\sAll\sappears\sto\swork\snow.
 -D 2015-11-12T15:47:48.274
++C Enhance\sthe\s"PRAGMA\scache_spill"\sstatement\sto\saccept\san\sinteger\sargument\swhich\nis\sthe\sthreshold\sat\swhich\sspilling\swill\sbegin.
++D 2015-11-12T16:44:40.812
  F Makefile.in d828db6afa6c1fa060d01e33e4674408df1942a1
  F Makefile.linux-gcc 7bc79876b875010e8c8f9502eb935ca92aa3c434
  F Makefile.msc e928e68168df69b353300ac87c10105206653a03
@@@ -326,14 -326,14 +326,14 @@@ F src/os_setup.h c9d4553b5aaa6f73391448
  F src/os_unix.c cf72e06e15839ebe7121e01d3eebf256c039b0ca
  F src/os_win.c 1716291e5ec2dbfc5a1fe0b32182030f1f7d8acf
  F src/os_win.h eb7a47aa17b26b77eb97e4823f20a00b8bda12ca
- F src/pager.c ed5cff11793b6a4146582aabb29ed8613a6cf89e
- F src/pager.h 7fc069c07f3120ee466ff3d48a9d376974ebffa7
+ F src/pager.c 18341e2b759b447cbc82fb9215d08d9c5864e92e
+ F src/pager.h 87c4118a71ba3965184148b379a6d93179071091
 -F src/parse.y 8a364a7a692e517dea8711b3c7f0d07fe32727d8
 +F src/parse.y aad5cc866dc23719f361fe7e0b8eaec8ce4861a4
- F src/pcache.c 24be750c79272e0ca7b6e007bc94999700f3e5ef
- F src/pcache.h 9968603796240cdf83da7e7bef76edf90619cea9
+ F src/pcache.c 73895411fa6b7bd6f0091212feabbe833b358d23
+ F src/pcache.h 1ff11adce609ba7de139b6abfabaf9a2bac947b5
  F src/pcache1.c 902e1bc7bdaa81b40f8543407c5e2ac8ef4dc035
- F src/pragma.c 9dbb9ba2453d79bfc5905be0398aa30342b066bb
- F src/pragma.h 631a91c8b0e6ca8f051a1d8a4a0da4150e04620a
 -F src/pragma.c 0e91830e5cea31771121eb8967e8c110f7e8216a
++F src/pragma.c 56161e4aa4891a45b534f6516acb343df15a5120
+ F src/pragma.h 31b110aaecb5603829c97747b99abfe491df5fa0
  F src/prepare.c 82e5db1013846a819f198336fed72c44c974e7b1
  F src/printf.c 0c4bcdd1c2e2521024f0a69cb5eb334f86b3652a
  F src/random.c ba2679f80ec82c4190062d756f22d0c358180696
@@@ -1402,7 -1402,7 +1402,8 @@@ F tool/vdbe_profile.tcl 246d0da094856d7
  F tool/warnings-clang.sh f6aa929dc20ef1f856af04a730772f59283631d4
  F tool/warnings.sh 48bd54594752d5be3337f12c72f28d2080cb630b
  F tool/win/sqlite.vsix deb315d026cc8400325c5863eef847784a219a2f
- P ed24d302657e8495bef7f5ed698c7cca12717be9
- R d2bed45a676ff9fbad30132bc7912ff2
 -P 549d42be0dac87dc04c3eeccfdc60615c3a6ad3f
 -R 675bbffc41ae7c4e7c58162bf39590a3
++P f84e3085c87cfffe4aba0eb4c4a3298b4027db83 9a431362dccbc9b8f93375f30a3b8955903cca79
++R 5f87cb60f8f27cae7787baa81cd88247
++T +closed 9a431362dccbc9b8f93375f30a3b8955903cca79
  U drh
- Z 9ab7252fe5fcd6a0ff588f1afe46df1d
 -Z 4ec2916143a078881954f66921bb963f
++Z c0a66dbf9634d84e657f233ea4ee622f

diff --cc manifest.uuid
index 6e51c4b405e5b6a40a9f2a98b37998cb1c0b10ac,27ce563ab6d3170b9f74e3fd8ce5cc2603dd3f3b..9052b6aab838884ebdc0fc487d5a7761c77231b5
--- 1/manifest.uuid
--- 2/manifest.uuid
+++ b/manifest.uuid
@@@ -1,1 -1,1 +1,1 @@@
- f84e3085c87cfffe4aba0eb4c4a3298b4027db83
 -9a431362dccbc9b8f93375f30a3b8955903cca79
++f79d264db24a470d1a4571e15a99cd3d68b5166c

diff --cc src/pragma.c
index a0e394f78200bf97187a7f174920b1e44e56accd,7754e26c89fede548ef0f66a35688c08c13c3049..792f4f7e3287be8c2e5d0ec85bd95e41b947065e
--- 1/src/pragma.c
--- 2/src/pragma.c
+++ b/src/pragma.c
@@@ -747,7 -747,51 +747,50 @@@ void sqlite3Pragma
    }
  
    /*
-   **  PRAGMA [database.]mmap_size(N)
+   **  PRAGMA [schema.]cache_spill
+   **  PRAGMA cache_spill=BOOLEAN
+   **  PRAGMA [schema.]cache_spill=N
+   **
+   ** The first form reports the current local setting for the
+   ** page cache spill size. The second form turns cache spill on
+   ** or off.  When turnning cache spill on, the size is set to the
+   ** current cache_size.  The third form sets a spill size that
+   ** may be different form the cache size.
+   ** If N is positive then that is the
+   ** number of pages in the cache.  If N is negative, then the
+   ** number of pages is adjusted so that the cache uses -N kibibytes
+   ** of memory.
+   **
+   ** If the number of cache_spill pages is less then the number of
+   ** cache_size pages, no spilling occurs until the page count exceeds
+   ** the number of cache_size pages.
+   **
+   ** The cache_spill=BOOLEAN setting applies to all attached schemas,
+   ** not just the schema specified.
+   */
+   case PragTyp_CACHE_SPILL: {
+     assert( sqlite3SchemaMutexHeld(db, iDb, 0) );
+     if( !zRight ){
 -      if( sqlite3ReadSchema(pParse) ) goto pragma_out;
+       returnSingleInt(v, "cache_spill", 
+          (db->flags & SQLITE_CacheSpill)==0 ? 0 : 
+             sqlite3BtreeSetSpillSize(pDb->pBt,0));
+     }else{
+       int size = 1;
+       if( sqlite3GetInt32(zRight, &size) ){
+         sqlite3BtreeSetSpillSize(pDb->pBt, size);
+       }
+       if( sqlite3GetBoolean(zRight, size!=0) ){
+         db->flags |= SQLITE_CacheSpill;
+       }else{
+         db->flags &= ~SQLITE_CacheSpill;
+       }
+       setAllPagerFlags(db);
+     }
+     break;
+   }
+ 
+   /*
+   **  PRAGMA [schema.]mmap_size(N)
    **
    ** Used to set mapping size limit. The mapping size limit is
    ** used to limit the aggregate size of all memory mapped regions of the