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Add the ability to turn of calls to fsync() using the "synchronous" pragma.

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Increased the default cache size from 100 to 2000 and made the "cache_size"
pragma persistent. (CVS 418)

FossilOrigin-Name: 414da4af1f4aebc3936ca339fbc7932add081912
This commit is contained in:
drh
2002-03-05 01:11:12 +00:00
parent ef2daf547d
commit 603240cf5d
11 changed files with 395 additions and 63 deletions
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18
src/os.c
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@@ -43,6 +43,20 @@
# include <winbase.h>
#endif
/*
** Macros for performance tracing. Normally turned off
*/
#if 0
static int last_page = 0;
#define SEEK(X) last_page=(X)
#define TRACE1(X) fprintf(stderr,X)
#define TRACE2(X,Y) fprintf(stderr,X,Y)
#else
#define SEEK(X)
#define TRACE1(X)
#define TRACE2(X,Y)
#endif
#if OS_UNIX
/*
@@ -477,6 +491,7 @@ int sqliteOsRead(OsFile *id, void *pBuf, int amt){
#if OS_UNIX
int got;
SimulateIOError(SQLITE_IOERR);
TRACE2("READ %d\n", last_page);
got = read(id->fd, pBuf, amt);
if( got<0 ) got = 0;
return got==amt ? SQLITE_OK : SQLITE_IOERR;
@@ -499,6 +514,7 @@ int sqliteOsWrite(OsFile *id, const void *pBuf, int amt){
#if OS_UNIX
int wrote;
SimulateIOError(SQLITE_IOERR);
TRACE2("WRITE %d\n", last_page);
wrote = write(id->fd, pBuf, amt);
if( wrote<amt ) return SQLITE_FULL;
return SQLITE_OK;
@@ -517,6 +533,7 @@ int sqliteOsWrite(OsFile *id, const void *pBuf, int amt){
** Move the read/write pointer in a file.
*/
int sqliteOsSeek(OsFile *id, int offset){
SEEK(offset/1024 + 1);
#if OS_UNIX
lseek(id->fd, offset, SEEK_SET);
return SQLITE_OK;
@@ -532,6 +549,7 @@ int sqliteOsSeek(OsFile *id, int offset){
*/
int sqliteOsSync(OsFile *id){
SimulateIOError(SQLITE_IOERR);
TRACE1("SYNC\n");
#if OS_UNIX
return fsync(id->fd)==0 ? SQLITE_OK : SQLITE_IOERR;
#endif