database/sqlite
1
0
Fork 0
mirror of https://github.com/sqlite/sqlite.git synced 2025-08-08 14:02:16 +03:00
Code Activity

Faster memory allocation from lookaside by not trying to keep track of the

Browse Source 
number of outstanding allocations, and rather computing that value only
when requested.

FossilOrigin-Name: a06263f1efd2d45eac88b8d59e8fe8e458670fa3808c795feaa7f247fc36cbe9
This commit is contained in:
drh
2017-08-29 20:21:12 +00:00
parent 83bebddbd9
commit 52fb8e1945
7 changed files with 67 additions and 33 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
src/sqliteInt.h
View File

@@ -1245,9 +1245,9 @@ struct Lookaside {
u32 bDisable; /* Only operate the lookaside when zero */
u16 sz; /* Size of each buffer in bytes */
u8 bMalloced; /* True if pStart obtained from sqlite3_malloc() */
int nOut; /* Number of buffers currently checked out */
int mxOut; /* Highwater mark for nOut */
int anStat[3]; /* 0: hits. 1: size misses. 2: full misses */
u32 nSlot; /* Number of lookaside slots allocated */
u32 anStat[3]; /* 0: hits. 1: size misses. 2: full misses */
LookasideSlot *pInit; /* List of buffers not previously used */
LookasideSlot *pFree; /* List of available buffers */
void *pStart; /* First byte of available memory space */
void *pEnd; /* First byte past end of available space */
@@ -3575,6 +3575,7 @@ sqlite3_int64 sqlite3StatusValue(int);
void sqlite3StatusUp(int, int);
void sqlite3StatusDown(int, int);
void sqlite3StatusHighwater(int, int);
int sqlite3LookasideUsed(sqlite3*,int*);
/* Access to mutexes used by sqlite3_status() */
sqlite3_mutex *sqlite3Pcache1Mutex(void);