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From Joe Orton <jor...@redhat.com>
Subject Re: apr_bucket_read() and data lifetimes
Date Wed, 17 Aug 2005 08:50:03 GMT
On Wed, Aug 17, 2005 at 02:39:49AM +0200, Graham Leggett wrote:
> I have a deluge of a few questions about the apr_bucket_read() function 
> within apr-util.
> 
> When you call it, it returns a buffer containing a length of data. 
> When I tried to use it on a 1.7MB file, it gave me the entire 1.7MB of 
> data in one go in a single buffer. What would happen if the file was 
> 1GB in size? Is there a cut off point somewhere for this?

You get a large buffer like that if the file gets mmap'ed into memory - 
yes, there is an upper limit, APR_MMAP_LIMIT (4Mb by default) per 
bucket.

> When the bucket is deleted using apr_bucket_delete(), is the bucket 
> deleted straight away, or only when the enclosing pool is cleared?

Straight away, essentially.

joe

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