Re: [sqlite] SQLite -- Very Slow -- ??

Michael Sizaki Fri, 13 Jan 2006 04:11:10 -0800

Hi Manfred,

sqlite writes makes sure that each transaction
ssi written to disk. If you have multiple inserts do


  BEGIN TRANSACTION;
  while(have_input)
    exec Sql-Statement
  COMMIT TRANSACTION;

http://web.utk.edu/%7Ejplyon/sqlite/SQLite_optimization_FAQ.html#transaction-wrappers


You can aslo speed up the time a transaction takes, if
your can live with potential database corruption
in case of a power failure:
 
http://web.utk.edu/%7Ejplyon/sqlite/SQLite_optimization_FAQ.html#pragma-synchronous

here are a few links about optimization:

http://www.sqlite.org/cvstrac/wiki?p=PerformanceTuning
http://web.utk.edu/~jplyon/sqlite/SQLite_optimization_FAQ.html


Michael

Manfred Bergmann wrote:

What do you mean by wrapping into a transaction?

Doing something like this? :
BEGIN TRANSACTION;
exec Sql-Statement
COMMIT TRANSACTION;


regards,
Manfred Bergmann


Am 13.01.2006 um 22:15 schrieb CARTER-HITCHIN, David, FM:

I had similar issues with inserts and solved them by wrapping the  insert
into a transaction.

Regards,

David Carter-Hitchin.
--
Royal Bank of Scotland
Interest Rate Derivatives IT
135 Bishopsgate
LONDON EC2M 3TP

Tel: +44 (0) 207 085 1088

-----Original Message-----
From: khaldoun kassem [mailto:[EMAIL PROTECTED]
Sent: 13 January 2006 11:00
To: sqlite-users@sqlite.org
Subject: [sqlite] SQLite -- Very Slow -- ??


Hi To All
I am new to the list

In fact i had a logging system (to log errors and messages),
for my application using text file, but its very slow.

I tried SQlite, and its slower than the text file, is it normal??

I do the folowing :


//Creating the db file
    int rc;
    rc = sqlite3_open(sFileName, &m_pSqliteDb);
    if( rc ){
        sqlite3_close(m_pSqliteDb);
        m_pSqliteDb=NULL;
        return;
    }

    rc = sqlite3_exec(m_pSqliteDb,"CREATE TABLE LOGS(L_ID
INTEGER PRIMARY
KEY,L_PROCESS INTEGER, L_THREAD INTEGER,L_MESSAGE TEXT,L_DATE
TIMESTAMP)",
0, 0, 0);

adding a log:

        rc = sqlite3_exec(m_pSqliteDb,"INSERT INTO
LOGS(L_PROCESS,L_THREAD,L_MESSAGE,L_DATE)
VALUES(nProc,nThread,'sMessage',date('now'))", 0, 0, 0);

it works, but its very slow?
is this normal

Thank you

Kh.K

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Re: [sqlite] SQLite -- Very Slow -- ??

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