My application always throw error that is "put: DB_PAGE_NOTFOUND:
Requested page not found" ,but my disk space is free .

I affirm that only one thread operte a table.

Hi,

What operating system are you using, and which version of Berkeley DB?

What type of database causes the problem? Are there multiple databases
in a single file (is the third parameter to DB->open NULL)? What type
of database environment do you open, if any? How do you configure the
database -- for example, do you set a key comparison function?

Regards,
Michael.

Sorry, My lock is released in error condition.So db is operted by many
threads.

My app must intercurrently read and intercurrently write with many
threads,How to set Env and Db flag ?How to use the lock?