database/sqlite
1
0
Fork 0
mirror of https://github.com/sqlite/sqlite.git synced 2025-11-18 10:21:03 +03:00
Code Activity
14,933 Commits 1,610 Branches 185 Tags
898f70bc28c4536a3b42c93d7d7aa8f68ca78c8a
Commit Graph

78 Commits

Author SHA1 Message Date
drh
4f9c8ec62d Test cases. Minor problems fixed. All appears to work now. 
FossilOrigin-Name: 9a431362dccbc9b8f93375f30a3b8955903cca79
 2015-11-12 15:47:48 +00:00
drh
9b0cf34f81 First attempt at enhancing the "PRAGMA cache_spill" statement to accept a 
cache threashold size.

FossilOrigin-Name: 549d42be0dac87dc04c3eeccfdc60615c3a6ad3f
 2015-11-12 14:57:19 +00:00
drh
95a0b37156 Change the pcache module to keep track of the total number of references to 
all pages rather than the number of pages references, for a performance
improvement and size reduction.

FossilOrigin-Name: f00a9e1e998c4bd249a45444dc2d71a7e4903b8b
 2015-09-03 20:43:55 +00:00
drh
d8c0ba3b02 Optimization to the sqlite3PcacheFetch() logic. 
FossilOrigin-Name: d9a0481ce0fd9824b1566f182d68ec46ef091b1b
 2015-06-30 03:57:59 +00:00
drh
1aacbdb374 Add the PGHDR_WRITEABLE bit for PgHdr.flags which is used to 
distinguish between pages that are on the dirty list and pages that are
safe to modify.

FossilOrigin-Name: 7c4ef7b7c8744af19075bb96d1e0b63e35978ed1
 2015-06-29 18:29:10 +00:00
drh
c78ae916b9 Add the new PGHDR_CLEAN bit to PgHdr.flags in pcache.c. This bit is always 
the opposite of PGHDR_DIRTY.  Use the extra bit to avoid a comparison
for a small performance boost.

FossilOrigin-Name: 8619fc346d9a5a66a3c4566b4cc032b6b6bf73fd
 2015-06-29 04:21:15 +00:00
drh
39065c60b3 Simplify the pcache by not keeping continuous track of page 1 but instead 
just loading page 1 on the rare occasions when it is actually needed.

FossilOrigin-Name: 015302f15e46a087ec92f3644c6741600dbf4306
 2015-06-26 02:41:31 +00:00
drh
e0e8429543 Remove all references to SQLITE_DEFAULT_TEMP_CACHE_SIZE. Add requirements 
marks related to cache_size changing.

FossilOrigin-Name: 766ad65025a9d5815300978e6e349f5af5db6012
 2015-02-27 21:53:35 +00:00
drh
ea18142624 Remove an unused preprocessor macro from pcache.c. 
FossilOrigin-Name: 88a7a967116a48aeb5fa7014613c0134b1b47bb3
 2015-01-09 19:45:28 +00:00
drh
51dc84eb70 Make SQLITE_CONFIG_PCACHE_HDRSZ accurate (not an over-estimate) on 32-bit 
systems.

FossilOrigin-Name: 340b347758e570db3e739b56af0dcf3fc34525be
 2014-12-30 13:04:25 +00:00
drh
37c057b8ff Round all object sizes that go into computing SQLITE_CONFIG_PCACHE_HDRSZ up 
to a multiple of 8 bytes.

FossilOrigin-Name: b28ce75f2d3a6343dc20d581dc55afae89ab5efa
 2014-12-30 00:57:29 +00:00
drh
def6889d21 Add the SQLITE_CONFIG_PCACHE_HDRSZ option for sqlite3_config(). 
FossilOrigin-Name: 6eb03e62a34e8e0964175283587247b0212db604
 2014-11-04 12:11:23 +00:00
drh
907214c8e8 Remove the EXPENSIVE_ASSERTS in pcache.c having to do with the pSynced field 
of the Pcache object, as they are incorrect, as revealed by recent pcache
enhancements.

FossilOrigin-Name: 69a64560777f85b47349b4b2aab01dc99298592e
 2014-09-15 14:59:12 +00:00
drh
36ce91913c Small performance improvement to the dirty list handling in the pager. 
FossilOrigin-Name: b332a84d5154f70f3197537df4af243eaebbb011
 2014-09-12 20:30:59 +00:00
peter.d.reid
60ec914c74 Fix typos in comments. No code changes. 
FossilOrigin-Name: e62aab5e9290503869e1f4d5e0fefd2b4dee0a69
 2014-09-06 16:39:46 +00:00
drh
bc59ac0e26 Refactor the sqlite3PcacheFetch() routine into three separate routines, 
which are significantly faster overall and about 100 bytes smaller in
size as well.

FossilOrigin-Name: bdb6e4978d1a26d5f795262172605184264ede9c
 2014-08-27 23:18:01 +00:00
drh
c3031c61ef Change the page cache so that a new sqlite3_pcache object is allocated as 
soon as the page cache is opened, not delayed until the first fetch request.
This give a noticable performance boost.  The interface between pager and
the page cache has changed slightly, which might break ZIPVFS.

FossilOrigin-Name: f1f94a971e031e784f8c30a6faf829df58709329
 2014-08-26 15:06:49 +00:00
drh
a8dcba9199 Combine the pcacheAddToDirtyList() and pcacheRemoveFromDirtyList() routines 
into a single pcacheManageDirtyList() routine.  The resulting binary code is
slightly faster and a few bytes smaller.

FossilOrigin-Name: 6bcf1af6a48dbda5ac6f6b3b02810bdfc4730000
 2014-08-22 20:35:29 +00:00
drh
fe21a796f7 Performance optimizations in sqlite3PcacheFetch(). 
FossilOrigin-Name: b60cc11ef775c23a2245d9e7a00dab34013f3ccb
 2014-02-03 17:04:29 +00:00
drh
5dc2bcda7e Make sure large negative arguments to PRAGMA cache_size do not cause 
32-bit signed integer overflow.  Also correct a requirements mark.

FossilOrigin-Name: 17c30634a71051158f8d37fd51b3c2a125ad8bd2
 2012-01-02 15:45:12 +00:00
drh
09419b4bae Add the sqlite3_db_release_memory() interface and the shrink_memory pragma. 
FossilOrigin-Name: 3f58e7c8895d1252eff56282c08b1a6f1194452c
 2011-11-16 19:29:17 +00:00
drh
3b42abb35b A negative value N for the cache_size pragma adjusts the number of cache 
pages to use approximately N kibibytes of memory.

FossilOrigin-Name: b3faa680aedc94ed8aa2819228c0d304b181cc51
 2011-11-09 14:23:04 +00:00
drh
e5c40b18e3 Update the API documentation for the new pcache2 interface. Change the 
order of parameters on the xCreate method of pcache2.

FossilOrigin-Name: 4da7095683ec821414e255419d63a24dbd9d726d
 2011-11-09 00:06:05 +00:00
dan
22e21ff4fc Experimental change to the pcache interface to allow page buffers to be allocated separately from their associated container structures. 
FossilOrigin-Name: c275c9d323cb1dccb031b199d413ac3a0b244fea
 2011-11-08 20:08:44 +00:00
drh
c97125eb72 Print a log message on each cache spill if compiled with 
SQLITE_LOG_CACHE_SPILL.

FossilOrigin-Name: 5f15579f8ca747f0fa0a7867ceffc8c7b8f904e6
 2011-05-28 15:53:07 +00:00
drh
f759bb83d4 Further updates to the sqlite3_pcache_methods documentation, plus the addition 
of a few evidence marks related to pcache.

FossilOrigin-Name: 34edb54bb03ad4e54f2e4de12d767e6fa8822ba4
 2010-09-09 18:25:34 +00:00
dan
026e598d0f Store the MemPage structure in memory following, instead of preceding, the page data for cached pages. This reduces the likelihood of a corrupt database page image causing SQLite to read past the end of a buffer. 
FossilOrigin-Name: 0ce42e76654d9ba52dac74c940d38b17866016ba
 2010-06-10 06:53:26 +00:00
drh
f3609eeba7 Put an ALWAYS() around a condition in pcache.c that must always be true in 
the current implementation.

FossilOrigin-Name: 88810cd091b33f2c56f842e32cafbac5d34d7412
 2010-03-19 19:23:51 +00:00
drh
2ec050c5b1 When TEMP files are in memory, also put the massive TEMP file used by 
the VACUUM command in memory.

FossilOrigin-Name: 9daf4e7d07769f25b3a579d80e7fada4e52344b1
 2010-03-02 23:34:54 +00:00
drh
a963896796 Fix a performance glitch that appears for large transactions. 
FossilOrigin-Name: 26cb1df73504d5d883cf0967e57b46aa062d0b00
 2010-02-04 17:38:31 +00:00
drh
c81c11f62c Remove the obsolete "$Id:$" RCS identifier strings from the source code. 
FossilOrigin-Name: f6c045f649036958078cb15cd9d5453680c82b0c
 2009-11-10 01:30:52 +00:00
danielk1977
750e87df2e Add files that should have gone in with the previous checkin. (CVS 6935) 
FossilOrigin-Name: 64c7afc704e95e13fb3315be402525d277a0d8d8
 2009-07-25 11:46:48 +00:00
danielk1977
89bc4bc645 Change getAndInitPage() (btree.c) to use only PagerAcquire(), not PagerLookup() and PagerAcquire(). (CVS 6916) 
FossilOrigin-Name: 0b41dfc066b60ccabbf1a9ab4db41ebcb73a2799
 2009-07-21 19:25:24 +00:00
drh
e64ca7ba11 Code simplifications and comment improvements in support of structural 
coverage testing. (CVS 6899)

FossilOrigin-Name: 945251798144110787b197f9eb552a2dd4a25cb4
 2009-07-16 18:21:17 +00:00
drh
8711c7d62e Remove two unused lines from pcache.c. (CVS 6415) 
FossilOrigin-Name: d5cab05c9ecbc5cb5e9ed658a55c35434717e969
 2009-03-31 01:32:18 +00:00
danielk1977
e1fd508a28 Optimization: When loading a new page into the cache, avoid redundant memset() calls to zero it. (CVS 6201) 
FossilOrigin-Name: 9c0b9f881367871105965d4268e2f2cde7f4d884
 2009-01-23 16:45:00 +00:00
danielk1977
bea2a94850 Big change to make pager.c easier to follow. Unused variables removed, comments improved, etc. (CVS 6197) 
FossilOrigin-Name: 12f7346c13c180ed73d7a2e3b590be457360254a
 2009-01-20 17:06:27 +00:00
danielk1977
45d6882fd9 Revert (6187). (CVS 6188) 
FossilOrigin-Name: a353c1ab376b159c4d12532412365318cdbdcc60
 2009-01-16 16:23:38 +00:00
danielk1977
443c0597fe This commit is an error. Reverted by (6188). (CVS 6187) 
FossilOrigin-Name: aa67fd0cdb4f53a0c6e15c001d37554d15006718
 2009-01-16 15:21:05 +00:00
drh
3d4501e573 Replace the VDBE Fifo object with the new RowSet object. (CVS 5977) 
FossilOrigin-Name: 39a0750b49cf55e9c0927169ca47db909f5c16ea
 2008-12-04 20:40:10 +00:00
danielk1977
f3d3c27a0c Fix some compiler warnings that show up when building the amalgamation only. (CVS 5927) 
FossilOrigin-Name: d1abe8a1c9a990b02c71d6c249436381c9fde443
 2008-11-19 16:52:44 +00:00
danielk1977
bc2ca9eb39 Add an API to support custom page cache implementations. (CVS 5899) 
FossilOrigin-Name: 47866d6708e9b69e367937fd85f93580fd025447
 2008-11-13 14:28:28 +00:00
danielk1977
95338ab70c Remove some asserts that refer to variables removed in (5830). (CVS 5884) 
FossilOrigin-Name: 9d880a6fd244fb73d0fce7e8180177c54d95cde2
 2008-11-11 18:43:00 +00:00
drh
4d01aeedbb When an assignment occurs in a boolean, always test the result using "!=0" 
to avoid confusion and make it clear that assignment is intended, not
an equality test.  Ticket #3491. (CVS 5879)

FossilOrigin-Name: 89ee5295bdea6f2c093eb6a44d69917dcc8459e3
 2008-11-11 00:36:16 +00:00
danielk1977
b3175389c7 Add "pragma journal_mode=memory". Change the way rollback works for in-memory databases so that it reuses the journal_mode=memory code. (CVS 5830) 
FossilOrigin-Name: 39ebf01addf9d0867daafd06a38719e725128f9c
 2008-10-17 18:51:52 +00:00
danielk1977
71d5d2cd49 Instead of storing a pointer to the parent page in the MemPage structure, have each B-Tree cursor keep track of the ancestry of the current page. (CVS 5747) 
FossilOrigin-Name: 40425e93421286cca1965d7a5769084526210c7a
 2008-09-29 11:49:47 +00:00
danielk1977
0afae93fa4 Fix some function declarations (change "int foo()" to "int foo(void)"). Ticket #3399. (CVS 5740) 
FossilOrigin-Name: 0fb98c35353d8c0a8d669bbe45fe84e3a5060621
 2008-09-24 09:12:46 +00:00
drh
0db8ac43b5 Give file scope to non-API routines in pcache. Ticket #3392. (CVS 5727) 
FossilOrigin-Name: 6521f98ac3a5cd2d959a9672cd07b1d25b82d559
 2008-09-21 15:14:04 +00:00
danielk1977
eaa06f6970 Avoid parsing the structure of b-tree pages (in sqlite3BtreeInitPage) more than is necessary. (CVS 5720) 
FossilOrigin-Name: 6b998f3066754e219c266501327e5578c9406b63
 2008-09-18 17:34:44 +00:00
drh
b3df2e1cfe Speed improvements for in-memory databases by omitting flag clearing on pages 
where it is impossible for the flag to be set and by avoiding assert()s on
non-debugging builds.  Ticket #3384. (CVS 5715)

FossilOrigin-Name: a7fd9e622bc1050e78f227ec42b6ba90c87c865a
 2008-09-17 20:06:26 +00:00