How can i get all items?
brad at danga.com
Wed Apr 5 17:45:40 UTC 2006
"stats cachedump" is a debugging command, and not part of the stable
interface. Subject to change at any time.
On Wed, 5 Apr 2006, Evan Fribourg wrote:
> Actually it is possible, although not with one single command.
> First I'd issue a "stats slabs", which lists all of the currently allocated
> slabs in the format:
> STAT (slab_num):(stat_name) (data)
> Example output:
> STAT 7:chunk_size 128
> STAT 7:chunks_per_page 8192
> STAT 7:total_pages 1
> STAT 7:total_chunks 8192
> STAT 7:used_chunks 8164
> STAT 7:free_chunks 28
> STAT 7:free_chunks_end 8164
> STAT 8:chunk_size 256
> STAT 8:chunks_per_page 4096
> STAT 8:total_pages 1
> STAT 8:total_chunks 4096
> STAT 8:used_chunks 4095
> STAT 8:free_chunks 1
> STAT 8:free_chunks_end 4095
> Then, with some programming, it is possible to parse out and get a list of
> unique slabs that are in use.
> Then, for each slab, you can issue "stats cachedump (slab_num)" which
> returns item keys in the format:
> ITEM (key) [(size) b; (timestamp) s]
> Example output:
> ITEM b00a31dfc29cdf6d3207cbcb81d29fe0 [2756 b; 1144257378 s]
> ITEM a40fb247233320619da2d742e691774b [3329 b; 1144257375 s]
> ITEM fea811327b1ed962aaeecdc87d759fc0 [3334 b; 1144257362 s]
> ITEM 910c35ef914bd45b44b0f1148e3e8c34 [3540 b; 1144257347 s]
> ITEM 1115ac936267339093b53d11e9c16075 [2673 b; 1144257128 s]
> Based on reviewing the code, however, there is a limit to the size of the
> output buffer -- so if you have so many keys that the size of the output
> exceeds the ouput buffer, then you won't be able to retrieve all keys for
> that slab -- output would be truncated.
> -----Original Message-----
> From: memcached-bounces at lists.danga.com
> [mailto:memcached-bounces at lists.danga.com] On Behalf Of Brad Fitzpatrick
> Sent: Wednesday, April 05, 2006 12:54 AM
> To: csepinek at freemail.hu
> Cc: memcached at lists.danga.com
> Subject: Re: How can i get all items?
> On Wed, 5 Apr 2006 csepinek at freemail.hu wrote:
> > Hi all!
> > Could someone tell me, how can i get all cached items? For example I
> > wanna get all key.
> > Thanks before...
> > --
> > Best regards,
> > csepinek mailto:csepinek at freemail.hu
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