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98aa1d735eb80f90b4523f50c17fc965ce967c79
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330 Commits

Author SHA1 Message Date
drh
7d113eb0ab Suppress a couple uninitialized variable warnings. 
FossilOrigin-Name: 29571e228cc85f7768c3ad57d0c7af96b5a54983
 2010-06-26 20:00:54 +00:00
dan
52d6fc0eda Reduce the average (but not maximum) size of the allocations made as part of a checkpoint. 
FossilOrigin-Name: 4a7fd91b7ab2c5d21fbac7f6f123820c8f4ec7f6
 2010-06-25 16:34:32 +00:00
dan
bdf1e2437e Reduce the size of the large allocation (approx 8KB for every 4000 frames in the log) that occurs during checkpoint. Use the 'scratch' memory for this allocation instead of the general purpose allocation. 
FossilOrigin-Name: 29887487ed549f97c3c9b37f852bae179b6ea9a9
 2010-06-25 15:16:25 +00:00
dan
f544b4c4b8 Modify the merge-sort in wal.c so that it does not use recursion. 
FossilOrigin-Name: daea6c054cee3564d8460d876b78a325ebc382dd
 2010-06-25 11:35:52 +00:00
drh
a927e94e71 Make sure the wal-index reader detects an incorrect version number even if 
it had to hold a lock in order to read the wal-index.  Also, expand and enhance
various comments in wal.c.

FossilOrigin-Name: 2e6a462cebc05bfd4648d26dd5ae70b68844aa5f
 2010-06-24 02:46:48 +00:00
drh
cd28508e58 Fix and/or improve comments in wal.c. No code changes. 
FossilOrigin-Name: ee9991be082202c6637adb47affc777e7917be04
 2010-06-23 22:00:35 +00:00
dan
10f5a50e57 Add a version number to the wal-index header. If SQLite encounters a version number in either the wal or wal-index files that it does not understand, the operation is abandoned and SQLITE_CANTOPEN returned. 
FossilOrigin-Name: 8d0f8a7f70d6fb42369411a934b30f8c8ca8322f
 2010-06-23 15:55:43 +00:00
drh
a715211820 Disable code used only by the codec when the codec is not deployed. 
FossilOrigin-Name: 2c90276e340aa19d78d2e33c9f759f8eda0b82a3
 2010-06-22 21:15:49 +00:00
dan
47ee386f06 Add codec support to wal mode. 
FossilOrigin-Name: 393741eba353d5d242b8e3c96db3ea2b92228036
 2010-06-22 15:18:44 +00:00
drh
ffca43014b Updates to comments and testcase() macros in wal.c. 
FossilOrigin-Name: 4d90cc0bc07e791b2838fc384866bd5c2282f681
 2010-06-15 11:21:54 +00:00
dan
188019153d Remove xShmGet/Size/Release from the sqlite3_vfs structure. Change the name of xShmPage to xShmMap. Remove some code that is now unused from os_unix.c and some of the test VFS implementations. 
FossilOrigin-Name: fc0cabc15c97dde6a852b4f07df6d30f1d2c04bc
 2010-06-14 14:07:50 +00:00
dan
ad3cadd8b2 Update some comments in wal.c. No code changes. 
FossilOrigin-Name: 1ce9c92bffa5d7f8431c005b29d698b0f5b95875
 2010-06-14 11:49:26 +00:00
dan
d60bf11036 Change the interface to internal function walGetHash() to make it easier to follow. 
FossilOrigin-Name: 5e8e2e978ea48ce4ad93a936c838934f33d665df
 2010-06-14 11:18:50 +00:00
dan
067f3165d8 Add the xShmPage method to the "crash" vfs in test6.c. 
FossilOrigin-Name: 1008f536440840da7d56c01ec147a25295fd1fd4
 2010-06-14 10:30:12 +00:00
dan
5d656852f7 Add some fault-injection tests to improve coverage. 
FossilOrigin-Name: 37b26d125f4b1d8e75bb38800fefd145611f94aa
 2010-06-14 07:53:26 +00:00
dan
4280eb3004 Fix some problems with handling IO errors on the experimental branch. 
FossilOrigin-Name: eade8bc238df580412f5cf1b91a91532ae671e46
 2010-06-12 12:02:35 +00:00
dan
13a3cb82ce Experimental change to the xShmXXX parts of the VFS interface. 
FossilOrigin-Name: ca68472db01c14a899892007d1cbaff5e86ae193
 2010-06-11 19:04:21 +00:00
dan
199100e2cd When restarting (wrapping) a log file, set all unused aReadMark[] slots to READMARK_NOT_USED instead of 0. Setting them to 0 does not cause a problem, but may cause SQLite to obtain and release a few more file locks than would otherwise be necessary. 
FossilOrigin-Name: 0797b10c0cc08ae38e26685d1f8331e37d428781
 2010-06-09 16:58:49 +00:00
drh
db7f647e41 Shift the meaning of aReadMark[] back so that +1 offset from mxFrame is 
removed.  Add the new READMARK_NOT_USED value (0xffffffff) instead of
zero to signal an aReadMark[] that is not in use.

FossilOrigin-Name: c576827d55c156572b76cf7063e9f253ca6e7403
 2010-06-09 14:45:12 +00:00
dan
15651f61df Simpler fix for the race condition also fixed by [7c102c7b5f] 
FossilOrigin-Name: 3c2de820034e01c2e939bd90a05a58159f60df50
 2010-06-09 11:28:43 +00:00
dan
640aac48f3 Add further test cases for the logic in sqlite3WalBeginReadTransaction(). 
FossilOrigin-Name: a49713db39d0d6940b368206d4e669aa69aa1fe5
 2010-06-05 19:18:59 +00:00
dan
eb8cb3a851 Clarify the purpose of a test for a race-condition in walIndexReadHdr(). 
FossilOrigin-Name: c041c6a9786bc9ebb82527f7a2c96d255aec927f
 2010-06-05 18:34:26 +00:00
dan
493cc590b6 Remove a condition from sqlite3WalRead() that is unreachable as of the changes to clear entries out of the wal-index hash tables on transaction or savepoint rollback. 
FossilOrigin-Name: 394204735a842b04b677cca20485b1578e475d4c
 2010-06-05 18:12:23 +00:00
dan
0626bd65fb Mark a condition in wal.c as ALWAYS(). 
FossilOrigin-Name: 3fe0cc784ac586358c08f87fba458dfbb5eec6f2
 2010-06-05 14:42:57 +00:00
dan
3cac5dc9bc Clarify an assert in sqlite3WalExclusiveMode(). 
FossilOrigin-Name: 255850699ddbf4aad8cc3223aefbada35daa0703
 2010-06-04 18:37:59 +00:00
dan
0153a9bc04 Remove an unnecessary branch from wal.c. 
FossilOrigin-Name: 8e54786c9a0c5c399f228f56c73271f84d75694b
 2010-06-04 17:16:52 +00:00
dan
d764c7de25 If an attempt to sync the database file as part of a checkpoint fails, do not update the shared "nBackfill" variable. Otherwise, another process could wrap the log and overwrite content before it is synced into the database. 
FossilOrigin-Name: b813233d7604a5fd91e1af91d5d812032eec700a
 2010-06-04 11:56:22 +00:00
dan
83f42d1b38 Fix a problem where an SQLITE_BUSY in the checkpoint code was being treated as an IO error (abandoning, instead of just limiting, the checkpoint). 
FossilOrigin-Name: 02c4040ce2b4c970b3dee09f7c9ad5a2a3a9aa49
 2010-06-04 10:37:05 +00:00
drh
2d37e1cfb9 When a lock fails due to an I/O error (not an SQLITE_BUSY) then the checkpoint 
should fail.

FossilOrigin-Name: c6eb0a27270df69018576232d8f97c16d63d8f6e
 2010-06-02 20:38:20 +00:00
dan
6e6bd5658f Fix a problem with rolling back to a savepoint opened before the writer decided to wrap the log file. 
FossilOrigin-Name: 6b4aed6aae7dc9e92807d27375cbe1e83c15841b
 2010-06-02 18:59:03 +00:00
drh
38933f2c11 When walTryBeginRead() encounters an I/O error trying to set a lock 
(as opposed to SQLITE_BUSY) be sure to propagate that error back up
the call stack.

FossilOrigin-Name: aa2c2b67a7f50c97a44cca1af5c437bf5410869c
 2010-06-02 15:43:18 +00:00
drh
aab4c02e47 Changes to make WAL more robust against SHM locking failures and OOM errors. 
FossilOrigin-Name: ebf4041383c3cdddb5861960359abd209d4a1028
 2010-06-02 14:45:51 +00:00
dan
9971e710e4 Delay the decision to restart the log file until data is actually ready to be written to the log file (instead of at the start of a write transaction). 
FossilOrigin-Name: b1abfaaf5309cc0d0dda4fb2c237862c8cf83261
 2010-06-01 15:44:57 +00:00
drh
f77bbd9fc5 Fix a bug introduced by the previous check-in but only seen if 
SQLITE_ENABLE_EXPENSIVE_ASSERTS is turned on.

FossilOrigin-Name: 9c9ec8994bf701249efce6c7bb911de4525808c8
 2010-06-01 13:17:44 +00:00
drh
9c1564779e Fix an off-by-one boundary-value issue in walCleanupHash(). 
FossilOrigin-Name: f039552e6330b6a04281748f985b41937f534bd0
 2010-06-01 12:58:41 +00:00
dan
e877296705 If the checkpoint fails to obtain an exclusive lock on one of the read-lock bytes, do not consider this an error. 
FossilOrigin-Name: 9e95e35728cf69a0ae50e774d7f6c71a41b17d97
 2010-06-01 10:44:28 +00:00
drh
181e091ff3 Comment edits and cleanup in wal.c. No functional code changes. 
FossilOrigin-Name: e8e666ab8273f5db5265f0773b39820f75b6df1a
 2010-06-01 01:08:08 +00:00
drh
61e4acecf4 Fix issues with locking_mode=EXCLUSIVE in WAL. 
FossilOrigin-Name: 8deba0cebd135a18da68530fab9e7d19dc21ddcb
 2010-05-31 20:28:37 +00:00
drh
4b82c387c9 Add an "isInit" field in the wal-index header that must be non-zero for 
a valid header.  Use this to detect an uninitialized wal-index.

FossilOrigin-Name: a16fde190183d1ae252d1aa305b23fdb88c603dc
 2010-05-31 18:24:19 +00:00
drh
15d6809222 Fix an inconsistent #ifdef in wal.c. Fix os_unix.c so that it does not allow 
moving an SHM lock directly exclusive to shared without going through unlocked.

FossilOrigin-Name: 552658da2845c2323167b6c7db6e5c00090f280c
 2010-05-31 16:56:14 +00:00
dan
d0aa34277f Avoid dropping the checkpoint lock after a recovery run as a precursor to a checkpoint operation. 
FossilOrigin-Name: cc25cfa04630a43c1de26f2dbdacbe46c110a2b5
 2010-05-31 16:41:53 +00:00
dan
3dee6da994 Zero the checkpoint header as the last step of successful WAL recovery. Avoid an unnecessary lock/unlock in WalBeginReadTransaction. 
FossilOrigin-Name: db3509c55dfe288650b803622e3a0828c6e59aea
 2010-05-31 16:17:54 +00:00
drh
20e1f08e0b Get the new xShmLock interface design working on os_win.c. 
FossilOrigin-Name: 149a7082e266edf0dc25c23823a9e240f5285215
 2010-05-31 16:10:12 +00:00
drh
18b7f604aa Make sure WAL alway requests enough shared-memory space. 
FossilOrigin-Name: 138f128317b6695530ca3fde7be4cdf22548cd22
 2010-05-31 14:39:31 +00:00
drh
34116eaf6a Do not fail a checkpoint just because active readers prevent backfill. 
FossilOrigin-Name: 9aa4243e0cedcc9204994d04af1b2b7a80c048bd
 2010-05-31 12:30:52 +00:00
drh
c74c333408 Add WALTRACE() macros to help with debugging and analysis. 
FossilOrigin-Name: 765c33181a7b9d99b452ce750d69f217b3c81a5d
 2010-05-31 12:15:19 +00:00
dan
1beb939db1 Another minor fix to checkpoint on the WAL branch. 
FossilOrigin-Name: 853f1e3f7720af2723b552bdf086bb106e6e93fe
 2010-05-31 12:02:30 +00:00
dan
0cc5b2b6c6 Fix a bug in checkpoint introduced by [181ceb32ea]. 
FossilOrigin-Name: b499dbc88a67b4200b5f527be88be4ac90f7043f
 2010-05-31 11:39:53 +00:00
dan
d54ff60bf4 Fix some asserts and other things in the new WAL branch. 
FossilOrigin-Name: 181ceb32ead7f540a7c6437f53a5b0f3e78162db
 2010-05-31 11:16:30 +00:00
drh
c99597ca10 WAL runs but quickly deadlocks. 
FossilOrigin-Name: ace58acbf1fad13d2be96cafebc3a22875098d03
 2010-05-31 01:41:15 +00:00