Comment 5 for bug 519822
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| John A Meinel (jameinel) wrote Re: [Bug 519822] Re: upgrading mysql repositories from format 1.14 to format 2a | #5 |
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GuilhemBichot wrote:
> We can go two ways:
> 1) make it a duplicate of 153787, which is to say, we'll fix the additional 2a slowness when we fix 153787, which isn't assigned. This means that MySQL won't upgrade to 2a before a long time (I cannot sell a 2a upgrade to colleagues if the slow annotate becomes twice slower).
> 2) evaluate whether fixing only the additional 2a slowness is possible, and possible now, and if so, do it, then we can consider upgrading to 2a.
>
The reason 2a is slower is fundamental (we no longer store deltas that
we can extract to generate a diff, which is one step farther than when
we stored the annotation data directly in pre-pack.)
I don't think it is possible to fix without fixing bug #153787
(introduce an annotation cache).
John
=:->
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