Re: [sqlite] Single row insert speeds

[Günter Greschenz]

hi,

i am using a "commit-thread":
my application is starting a transaction with "begin" and is inserting a 
lot of data at random times,
a thread is doing "commit" and "begin" every second (while locking the 
main app of course :-).
this runs very fast and in case of crashes i loose only 1 second of data !
cu, gg



Mark Riehl wrote:
I've got an application that logs real-time data.  Some of the data is
periodic (every few secs), other data comes more frequently.
Basically, I'm not dealing with bulk inserts, so, I can't queue things
up and insert all at once.

I'm noticing that my insert times are pretty slow (~5-50 ms on a Intel
Core 2) for a single record of ~100 bytes.

Any suggestions for speeding up single row inserts?  I saw some of the
other threads on using transactions, but, not sure if that applied to
single inserts.

Here is a simple app I wrote to test the timing:

   int rc = sqlite3_open("mydb.db", &db);

    for (i = 0; i < 10; i++) {

      printf("Executing %s\n", insertStatement);

      gettimeofday(&before, 0);
      rc = sqlite3_exec(db, insertStatement, NULL, NULL, &zErr);
      gettimeofday(&after, 0);
      if (rc != SQLITE_OK) {
         ...
        }
      }

      printf("Before %d %d\n", before.tv_sec, before.tv_usec);
      printf("After %d %d\n", after.tv_sec, after.tv_usec);

      sleep(1);
    }

    sqlite3_close(db);

Thanks for the help,
Mark

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