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Overview
| Comment: | Correctly update the cache page-count when discarding pages in the xTruncate() method of the default pcache implementation. Otherwise the effective configured size of the cache shrinks each time xTruncate() is called. Fix for #3844. (CVS 6619) |
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| Timelines: | family | ancestors | descendants | both | trunk |
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| SHA1: |
88211ceeec01ee0d3e55231512be26dd |
| User & Date: | danielk1977 2009-05-08 06:52:48 |
Context
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2009-05-08
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| 11:34 | Fix a warning in the osx-specific part of os_unix.c. Ticket #3847. (CVS 6620) check-in: 254ca327 user: danielk1977 tags: trunk | |
| 06:52 | Correctly update the cache page-count when discarding pages in the xTruncate() method of the default pcache implementation. Otherwise the effective configured size of the cache shrinks each time xTruncate() is called. Fix for #3844. (CVS 6619) check-in: 88211cee user: danielk1977 tags: trunk | |
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2009-05-07
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| 14:11 | If compiling FTS3 in the amalgamation, include the ctype.h header file. Ticket #3843. (CVS 6618) check-in: 660108ef user: drh tags: trunk | |
Changes
Changes to src/pcache1.c.
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** ** This file implements the default page cache implementation (the ** sqlite3_pcache interface). It also contains part of the implementation ** of the SQLITE_CONFIG_PAGECACHE and sqlite3_release_memory() features. ** If the default page cache implementation is overriden, then neither of ** these two features are available. ** ** @(#) $Id: pcache1.c,v 1.11 2009/04/14 18:44:39 aswift Exp $ */ #include "sqliteInt.h" typedef struct PCache1 PCache1; typedef struct PgHdr1 PgHdr1; typedef struct PgFreeslot PgFreeslot; ................................................................................ ** ** The global mutex must be held when this function is called. */ static void pcache1TruncateUnsafe( PCache1 *pCache, unsigned int iLimit ){ unsigned int h; assert( sqlite3_mutex_held(pcache1.mutex) ); for(h=0; h<pCache->nHash; h++){ PgHdr1 **pp = &pCache->apHash[h]; PgHdr1 *pPage; while( (pPage = *pp)!=0 ){ if( pPage->iKey>=iLimit ){ pcache1PinPage(pPage); *pp = pPage->pNext; pcache1FreePage(pPage); }else{ pp = &pPage->pNext; } } } } /******************************************************************************/ /******** sqlite3_pcache Methods **********************************************/ /* ** Implementation of the sqlite3_pcache.xInit method. |
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** ** This file implements the default page cache implementation (the ** sqlite3_pcache interface). It also contains part of the implementation ** of the SQLITE_CONFIG_PAGECACHE and sqlite3_release_memory() features. ** If the default page cache implementation is overriden, then neither of ** these two features are available. ** ** @(#) $Id: pcache1.c,v 1.12 2009/05/08 06:52:48 danielk1977 Exp $ */ #include "sqliteInt.h" typedef struct PCache1 PCache1; typedef struct PgHdr1 PgHdr1; typedef struct PgFreeslot PgFreeslot; ................................................................................ ** ** The global mutex must be held when this function is called. */ static void pcache1TruncateUnsafe( PCache1 *pCache, unsigned int iLimit ){ TESTONLY( int nPage = 0; ) /* Used to assert pCache->nPage is correct */ unsigned int h; assert( sqlite3_mutex_held(pcache1.mutex) ); for(h=0; h<pCache->nHash; h++){ PgHdr1 **pp = &pCache->apHash[h]; PgHdr1 *pPage; while( (pPage = *pp)!=0 ){ if( pPage->iKey>=iLimit ){ pCache->nPage--; *pp = pPage->pNext; pcache1PinPage(pPage); pcache1FreePage(pPage); }else{ pp = &pPage->pNext; TESTONLY( nPage++; ) } } } assert( pCache->nPage==nPage ); } /******************************************************************************/ /******** sqlite3_pcache Methods **********************************************/ /* ** Implementation of the sqlite3_pcache.xInit method. |
Changes to test/pcache.test.
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# May you find forgiveness for yourself and forgive others. # May you share freely, never taking more than you give. # #*********************************************************************** # # This file is focused on testing the pcache module. # # $Id: pcache.test,v 1.4 2009/03/05 14:59:40 danielk1977 Exp $ set testdir [file dirname $argv0] source $testdir/tester.tcl # The pcache module limits the number of pages available to purgeable # caches to the sum of the 'cache_size' values for the set of open ................................................................................ } {current 19 max 20 min 10 recyclable 19} do_test pcache-1.13 { execsql { PRAGMA cache_size = 15 } pcache_stats } {current 15 max 15 min 10 recyclable 15} finish_test |
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# May you find forgiveness for yourself and forgive others. # May you share freely, never taking more than you give. # #*********************************************************************** # # This file is focused on testing the pcache module. # # $Id: pcache.test,v 1.5 2009/05/08 06:52:48 danielk1977 Exp $ set testdir [file dirname $argv0] source $testdir/tester.tcl # The pcache module limits the number of pages available to purgeable # caches to the sum of the 'cache_size' values for the set of open ................................................................................ } {current 19 max 20 min 10 recyclable 19} do_test pcache-1.13 { execsql { PRAGMA cache_size = 15 } pcache_stats } {current 15 max 15 min 10 recyclable 15} do_test pcache-1.14 { hexio_write test.db 24 [hexio_render_int32 1000] execsql { SELECT * FROM sqlite_master } pcache_stats } {current 2 max 15 min 10 recyclable 2} do_test pcache-1.15 { execsql { SELECT * FROM t1 ORDER BY a; SELECT * FROM t1; SELECT * FROM t2 ORDER BY a; SELECT * FROM t2; SELECT * FROM t3 ORDER BY a; SELECT * FROM t3; SELECT * FROM t4 ORDER BY a; SELECT * FROM t4; SELECT * FROM t5 ORDER BY a; SELECT * FROM t5; SELECT * FROM t6 ORDER BY a; SELECT * FROM t6; SELECT * FROM t7 ORDER BY a; SELECT * FROM t7; SELECT * FROM t8 ORDER BY a; SELECT * FROM t8; SELECT * FROM t9 ORDER BY a; SELECT * FROM t9; } pcache_stats } {current 14 max 15 min 10 recyclable 14} finish_test |