On 5 Dec 2019, at 6:31pm, Zhu, Liang [AUTOSOL/ASSY/US] <liang....@emerson.com> 
wrote:

> If I do not do Vacuum,  my database size just keep raising,  eventually the 
> database size gets to over 90% of storage size,  I can save data to the 
> database any more.

VACUUM should not be saving you any space.  And VACUUM puts a lot of traffic 
through your storage device which will eventually kill it.

What journal mode are you using ?  In other words, what does the command
    PRAGMA journal_mode
output ?

Does your application close the connection correctly ?  In other words, do you 
call sqlite3_close() or sqlite3_close_v2() and check the result code it returns 
?
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