The questions are answered below:
Caldarale, Charles R escribió:
From: Raquel Pau [mailto:r...@ac.upc.edu]
Subject: Re: slow upload
The file is uploaded with an acceptable time completely random times,
but in general occurs at the third time.
Please answer *all* the questions:
Is the computer doing anything else at the time you experience slow
uploads?
No, the computer it is only debugging this feature on eclipse and an
Oracle database server is running also.
Does it have any other functions that might cause lots of disk
access?
There is a database server, but any other application is connected to
this server. However, the disk access should not affect to an stream
from an HTTP connection because the sended content is not stored in any
file..
And tell us exactly how you're doing the upload - the WebDAV
servlet, a custom webapp, something else?
We have overwritten some classes of the commons-upload, because we don't
want to write temporal on the disk without a database control.
Therefore, our function consist of read the stream and store it in a
blob. It is done using Streams.copy(inputStream, outputStream).
Debugging and tracing the
application, the slow part is the read method over the inputStream,
which reads over the CoyoteStreamReader.
And some new ones:
Is GC occurring during the large uploads? Are you encountering page thrashing?
How we can know how meny times the GC is occurring? We will work on
discover that information...
- Chuck
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