Hi Guys,

Yes, I'll sort this out later and issue a new release.

Just please tell me which specific version of Sedna this new functionality came 
in please?

Kind Regards,

Charles

On 12 Apr 2013, at 16:33, "Ivan Lagunov" <lagi...@gmail.com> wrote:

> P.S. This is the corresponding commit: 
> http://sedna.org/gitweb/sedna.git/commit/a7306ad318593d7ff308628f8cfb542ddfa672b2
> As it’s dated by today, I expect it’ll be available in the night builds since 
> tomorrow.
>  
> @Ivan, please correct me if I’m wrong.
>  
> Best regards,
> Ivan Lagunov
>  
> From: Ivan Lagunov [mailto:lagi...@gmail.com] 
> Sent: Friday, April 12, 2013 5:30 PM
> To: 'Charles Foster'
> Cc: 'sedna-discussion'; 'Ivan Shcheklein'
> Subject: XML:DB API performance issue - fn:doc-available
>  
> Hi Charles,
>  
> We’re having serious performance issues, probably reached the critical number 
> of documents in the database. According to Ivan Shcheklein, it is likely to 
> be caused by using doc(“documents”) function that actually locks all 
> collections in the database, thus, drastically decreasing performance. Your 
> implementation of XML:DB API works great for small datasets but according to 
> event.log it uses doc(“documents”) quite a lot. So it may indeed result in 
> bad performance I’m facing. As an improvement, there have been implemented a 
> function fn:doc-available that checks if a document is available in the given 
> collection. It locks only one collection. This is an example of usage:
>  
> doc-available(“collection”, “document”)
>  
> Could you please update the Sedna XML:DB API implementation using this 
> function? I understand it’s recommended to migrate to XQJ implementation but 
> it’s really hard to rewrite all the code we have. Nevertheless, I’ve planned 
> to investigate required efforts for this migration but we need some solution 
> on short notice. Thanks a lot!
>  
> Best regards,
> Ivan Lagunov

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