Re: [sqlite] db crash when creating rows
I compiled your program with MinGW gcc 3.4.2 on Windows with sqlite-amalgamation-3_5_3.zip. gcc -I. ged.c sqlite3.c -o ged.exe It runs fine. If another sqlite3 process issues a query like: select * from test; while ged.exe is running, then ged.exe will exit with: Creating 10 rows... died on row 2595 SQL error 2: database is locked So I'm wondering if another process accessed your database file while it was running. Or perhaps, are you running antivirus software on your PC? What happens if you retry sqlite3_exec a few times after failure instead of exitting? (throw in Sleep(50) after each failure for good measure) --- Ged Murphy <[EMAIL PROTECTED]> wrote: > I am doing some programmatic stress / benchmark testing on sqlite in the > hope it'll be of use to me in my project. > > I'm performing some simple stress tests to gauge read/write speeds, whereby > I fill a table with a large amount rows > > However, I hit the following problem on writing: > > Creating 10 rows... > > died on row 1075 > > SQL error 2: unable to open database fi > > Press any key to continue . . . > > I'm using version 3.5.2 and my stress test code (written in C) is attached. > > Does anyone have any ideas as to why it fails? Get easy, one-click access to your favorites. Make Yahoo! your homepage. http://www.yahoo.com/r/hs - To unsubscribe, send email to [EMAIL PROTECTED] -
RE: [sqlite] db crash when creating rows
Simon Davies wrote: > Compiled your snippet using VS2005 on XP, sqlite 3.4.2 - > ran to completion with no errors Yeah, I had no errors when I ran this using the native exports from the System.Data.SQLite.dll .NET wrapper from http://sqlite.phxsoftware.com This also uses the 3.4.2 library. I can only assume there's a problem with the 3.5.* lib somewhere when bulk filling in this manner. > PS Took nrly 2 hrs. Added "BEGIN" and "COMMIT" around insert loop, > reduced time to 10 seconds Yeah, it's a long way of filling but I needed to test it in this way as it'd be filled up by single queries in the real world Thanks, Ged. - To unsubscribe, send email to [EMAIL PROTECTED] -
Re: [sqlite] db crash when creating rows
Hi Ged, Compiled your snippet using VS2005 on XP, sqlite 3.4.2 - ran to completion with no errors Rgds, Simon PS Took nrly 2 hrs. Added "BEGIN" and "COMMIT" around insert loop, reduced time to 10 seconds On 27/11/2007, Ged Murphy <[EMAIL PROTECTED]> wrote: > > > > Hi, > > > > I am doing some programmatic stress / benchmark testing on sqlite in the > hope it'll be of use to me in my project. > > I'm performing some simple stress tests to gauge read/write speeds, whereby > I fill a table with a large amount rows > > However, I hit the following problem on writing: > > > > Creating 10 rows... > > died on row 1075 > > SQL error 2: unable to open database fi > > Press any key to continue . . . > > > > I'm using version 3.5.2 and my stress test code (written in C) is attached. > > Does anyone have any ideas as to why it fails? > > > > Thanks, > > Ged > > > > > > > > > > > > > - > To unsubscribe, send email to > [EMAIL PROTECTED] > - > > - To unsubscribe, send email to [EMAIL PROTECTED] -
[sqlite] db crash when creating rows
Hi,
I am doing some programmatic stress / benchmark testing on sqlite in the
hope it'll be of use to me in my project.
I'm performing some simple stress tests to gauge read/write speeds, whereby
I fill a table with a large amount rows
However, I hit the following problem on writing:
Creating 10 rows...
died on row 1075
SQL error 2: unable to open database fi
Press any key to continue . . .
I'm using version 3.5.2 and my stress test code (written in C) is attached.
Does anyone have any ideas as to why it fails?
Thanks,
Ged
#include
#include
#include
#define TESTDB "C:\\Users\\Ged\\Desktop\\sqlite stuff\\benchmarking\\testdb"
#define MAX_ROWS 10
static int
ReadCallback(void *NotUsed,
int argc,
char **argv,
char **azColName)
{
/* do stuff */
return 0;
}
static BOOL
FillDatabase(sqlite3 *db)
{
INT ret, i;
char *zErrMsg = 0;
BOOL bRet = FALSE;
printf("Creating %d rows...\n", MAX_ROWS);
ret = sqlite3_exec(db,
"CREATE TABLE test (ID integer primary key
autoincrement, Field1 int, Field2 VARCHAR(50))",
NULL,
0,
&zErrMsg);
if (ret == SQLITE_OK)
{
for (i = 0; i < MAX_ROWS; i++)
{
ret = sqlite3_exec(db,
"INSERT INTO test(Field1, Field2) VALUES(15,
'Hello')",
NULL,
0,
&zErrMsg);
if (ret != SQLITE_OK)
{
fprintf(stderr, "died on row %d\n", i);
fprintf(stderr, "SQL error 2: %s\n", zErrMsg);
sqlite3_free(zErrMsg);
return FALSE;
}
//Sleep(5);
}
bRet = TRUE;
}
else
{
fprintf(stderr, "SQL error 1: %s\n", zErrMsg);
sqlite3_free(zErrMsg);
}
return bRet;
}
static VOID
ReadDatabase(sqlite3 *db)
{
INT ret;
char *zErrMsg = 0;
printf("Reading %d rows...\n", MAX_ROWS);
ret = sqlite3_exec(db,
"SELECT * FROM test",
ReadCallback,
0,
&zErrMsg);
if (ret != SQLITE_OK)
{
fprintf(stderr, "SQL error: %s\n", zErrMsg);
sqlite3_free(zErrMsg);
}
}
static BOOL
OpenDatabase(sqlite3 **db)
{
INT ret;
ret = sqlite3_open(TESTDB, db);
if (ret != SQLITE_OK)
{
fprintf(stderr, "Can't open database: %s\n", sqlite3_errmsg(*db));
}
return (ret == SQLITE_OK);
}
static VOID
CloseDatabase(sqlite3 *db)
{
if (db)
sqlite3_close(db);
}
int main (int argc, char* argv[])
{
sqlite3 *db = NULL;
DWORD startwrite = 0, startread = 0;
DWORD endwrite = 0, endread = 0;
DeleteFileA(TESTDB);
if (OpenDatabase(&db))
{
startwrite = GetTickCount();
if (FillDatabase(db))
{
endwrite = startread = GetTickCount();
ReadDatabase(db);
endread = GetTickCount();
}
CloseDatabase(db);
}
if (endwrite)
{
INT writetime = endwrite - startwrite;
if (writetime > 1000)
{
writetime /= 1000;
if (writetime > 60)
{
int min = writetime / 60;
int sec = writetime % 60;
printf("\ncreate time - %d.%d mins\n", min, sec);
}
else
printf("\ncreate time - %d secs\n", writetime);
}
else
printf("\ncreate time - %d ms\n", writetime);
if (endread)
printf("read time - %d ms\n\n", endread - startread);
}
system("PAUSE");
return 0;
}
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