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Overview
| Comment: | Avoid taking locks on unused database connections when committing a read transaction. |
|---|---|
| Downloads: | Tarball | ZIP archive | SQL archive |
| Timelines: | family | ancestors | descendants | both | trunk |
| Files: | files | file ages | folders |
| SHA1: |
c0ee614fd988f445c4884a37f494479b |
| User & Date: | drh 2010-10-14 01:17:30 |
Context
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2010-10-21
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| 02:05 | Fix the query planner so that it uses the multi-index OR-clause solution if that is the lowest cost estimate. A prior bug cause the multi-index solution to be ignored in some circumstances. (check-in: 28ba6255 user: drh tags: trunk) | |
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2010-10-19
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| 14:08 | Experimental changes to fts4 to try to selectively avoid loading very large doclists. (check-in: 5ae0ba44 user: dan tags: experimental) | |
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2010-10-14
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| 01:17 | Avoid taking locks on unused database connections when committing a read transaction. (check-in: c0ee614f user: drh tags: trunk) | |
| 01:16 | Check-in [d3c95e3a4e08d0] was incorrect. This is the correct fix for sqlit3_bind_blob(). Ticket [860399cc408f2dd5f4] (check-in: ea8c2f5f user: drh tags: trunk) | |
Changes
Changes to src/btree.c.
3163 3163 ** the rollback journal (which causes the transaction to commit) and 3164 3164 ** drop locks. 3165 3165 ** 3166 3166 ** This will release the write lock on the database file. If there 3167 3167 ** are no active cursors, it also releases the read lock. 3168 3168 */ 3169 3169 int sqlite3BtreeCommitPhaseTwo(Btree *p){ 3170 - BtShared *pBt = p->pBt; 3171 3170 3171 + if( p->inTrans==TRANS_NONE ) return SQLITE_OK; 3172 3172 sqlite3BtreeEnter(p); 3173 3173 btreeIntegrity(p); 3174 3174 3175 3175 /* If the handle has a write-transaction open, commit the shared-btrees 3176 3176 ** transaction and set the shared state to TRANS_READ. 3177 3177 */ 3178 3178 if( p->inTrans==TRANS_WRITE ){ 3179 3179 int rc; 3180 + BtShared *pBt = p->pBt; 3180 3181 assert( pBt->inTransaction==TRANS_WRITE ); 3181 3182 assert( pBt->nTransaction>0 ); 3182 3183 rc = sqlite3PagerCommitPhaseTwo(pBt->pPager); 3183 3184 if( rc!=SQLITE_OK ){ 3184 3185 sqlite3BtreeLeave(p); 3185 3186 return rc; 3186 3187 }