What I wanted to say is that if the if the cache works nice up to 95% for
the smaller thumbnails the gap from the 80 to the 95 means a lot of images
that can be stored. For the largest it can be 1 or 2.
El 04/09/2013 18:06, "johannes hanika" <[email protected]> escribió:
> i'm missing your point i think. if one thumbnail makes such a small
> difference you already fit like 8000 in your cache? you're complaining
> about the other 20%? you'll have to invent a better O(1) accessing scheme
> than hash tables in this case.. :/
>
> j.
>
>
> On Wed, Sep 4, 2013 at 5:58 PM, Jose Carlos Garcia Sogo
> <[email protected]>wrote:
>
>> The thing is that for the smaller thumbnails going from 79,99% to
>> 80,01% is only a matter of a thumbnail, while we are missing thousands
>> of thumbnails to be available, more if we have compression enabled.
>>
>> On Wed, Sep 4, 2013 at 12:13 PM, johannes hanika <[email protected]>
>> wrote:
>> > 80% is a common mark for hashtables to become inefficient. the hopscotch
>> > hashing scheme we use claims to go as high as 90 or 95, i forget, but we
>> > still use 80 as a soft limit (meaning if you're below 80, say 79, you
>> always
>> > get your new slot, even if it takes you to 95).
>> >
>> > j.
>> >
>> >
>> > On Wed, Sep 4, 2013 at 12:01 PM, Jose Carlos Garcia Sogo <
>> [email protected]>
>> > wrote:
>> >>
>> >> Why do we have the 80% limit set?
>> >>
>> >> On Wed, Sep 4, 2013 at 11:45 AM, johannes hanika <[email protected]>
>> >> wrote:
>> >> > okay, cool. your cache memory size is just too small. 1.5G as in your
>> >> > last
>> >> > mail seems more reasonable, you might even try 2G.
>> >> >
>> >> > sure, it's a cache.. it throws out the stuff it thinks you don't need
>> >> > any
>> >> > more quite as urgently as other stuff, to stay within the given
>> limit.
>> >> >
>> >> > -jo
>> >> >
>> >> >
>> >> > On Wed, Sep 4, 2013 at 11:38 AM, Pascal Obry <[email protected]>
>> wrote:
>> >> >>
>> >> >>
>> >> >> Johannes,
>> >> >>
>> >> >> > just to be sure: is the cache just not very effective at what it
>> does
>> >> >> > or
>> >> >> > are all the thumbnails always gone when you restart?
>> >> >>
>> >> >> > [mipmap_cache] level [i0] ( 200x 150) fill 171.19/213.97 MB
>> (80.00%
>> >> >> > in
>> >> >> > 11797/16384 buffers)
>> >> >> > [mipmap_cache] level [i1] ( 400x 300) fill 36.46/52.75 MB (69.12%
>> in
>> >> >> > 637/1024 buffers)
>> >> >> > [mipmap_cache] level [i2] ( 800x 600) fill 16.94/52.74 MB (32.12%
>> in
>> >> >> > 74/256 buffers)
>> >> >> > [mipmap_cache] level [i3] (1600x1200) fill 0.00/52.74 MB (0.00% in
>> >> >> > 0/64
>> >> >> > buffers)
>> >> >> > [mipmap_cache] level [f4] fill 0/2 slots (0.00% in 0/4 buffers)
>> >> >> > [mipmap_cache] level [f5] fill 2/2 slots (100.00% in 2/4 buffers)
>> >> >> > [mipmap_cache] scratch fill 14.65/13.18 MB (111.11% in 2/4
>> buffers)
>> >> >> > [mipmap_cache] level | near match | miss | stand-in | fetches |
>> total
>> >> >> > rq
>> >> >> > [mipmap_cache] i0 | 91.67% | 91.67% | -nan% | 46.15% |
>> >> >> > 100.00%
>> >> >> > [mipmap_cache] i1 | -nan% | -nan% | -nan% | 0.00% |
>> >> >> > 0.00%
>> >> >> > [mipmap_cache] i2 | -nan% | -nan% | -nan% | 0.00% |
>> >> >> > 0.00%
>> >> >> > [mipmap_cache] i3 | -nan% | -nan% | -nan% | 0.00% |
>> >> >> > 0.00%
>> >> >> > [mipmap_cache] f4 | -nan% | -nan% | -nan% | 0.00% |
>> >> >> > 0.00%
>> >> >> > [mipmap_cache] f5 | -nan% | -nan% | -nan% | 53.85% |
>> >> >> > 0.00%
>> >> >>
>> >> >> Using cache_memory to 536870912 it looks like the i0 cache is almost
>> >> >> full (reaching 80% and not moving above). Do we have cache
>> invalidation
>> >> >> for old thumbnails in the case where a cache is full?
>> >> >>
>> >> >> I'm asking because testing with a cache_memory of 1536870912 seems
>> to
>> >> >> help... I still need to do more testing though.
>> >> >>
>> >> >> And this makes sense as I have observed this behavior since I have
>> >> >> imported a large bunch of my images recently.
>> >> >>
>> >> >> Pascal.
>> >> >>
>> >> >> --
>> >> >> Pascal Obry / Magny Les Hameaux (78)
>> >> >>
>> >> >> The best way to travel is by means of imagination
>> >> >>
>> >> >> http://v2p.fr.eu.org
>> >> >> http://www.obry.net
>> >> >>
>> >> >> gpg --keyserver keys.gnupg.net --recv-key F949BD3B
>> >> >>
>> >> >>
>> >> >>
>> >> >>
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>> >>
>> >> --
>> >> José Carlos García Sogo
>> >> [email protected]
>> >>
>> >>
>> >>
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>>
>>
>> --
>> José Carlos García Sogo
>> [email protected]
>>
>>
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