On Thu, Jun 15, 2017 at 4:23 PM, Niels Charlier <[email protected]> wrote:
> Hello Andrea,
>
> Indeed I missed this while searching for past discussions about jdbc
> performance. In the meantime I read your proposal, the email discussion,
> and had a look at the PR. That looks like great stuff. But it is not
> entirely clear to me what effect your changes have on the amount of name
> queries per request with jdbcconfig, are they significantly reduced?
> Perhaps my suggestion can still make a difference.
>
I just investigated why JDBCConfig was so much slower than the latest
DefaultCatalogFacade when doing OGC request, and found the same (too many
queries to go from name to ID).
But GSIP 255 changes did not touch jdbcconfig at all.
>
> On 15-06-17 16:02, Andrea Aime wrote:
>
> Nowadays there is from a cache keyed by immutables (ids), you are adding a
> cache of mutables (I believe you need to cache by qualitified name, ws:
> name), so how are you going to spread the word across cluster nodes when a
> layer or workspace name changes, or gets removed? Is the hz-cluster
> covering this already?
>
> yes, hz-cluster already covers a joint cache. Upon a change, the item
> would be invalidated based on the old name and recached with the new name.
>
Then I guess you're good to go
Cheers
Andrea
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