Flush file before writing using UTL_FILE

Hi,
Version: 10g
I am using the UTL_FILE.PUT_LINE to write some data into a file.
Now my requirement is to flush this file before every write. Is there a function/procedure which does this?
Require help ASAP.
Thanks in advance.

Why flush before a write? The write buffer will be empty. And there will be nothing to flush.
You need to flush after a write in order to flush that write buffer to disk.
You also need to ask yourself why you want to do this? Write caches/lazy writes improve performance. The primary reason for flushing a cache is to ensure that the cache contents are on disk in case the process dies and its dirty unwritten cache is destroyed with it.
Do you expect your process to crash and die? If not, then what other reasons do you think warrants flushing the cache after each write?

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