[MarkLogic Dev General] setting tree cache partitions?

Michael Blakeley michael.blakeley at marklogic.com
Tue Jul 29 20:25:03 PDT 2008


David Sewell wrote:
> In the MarkLogic admin console, Groups configure panel, what is the 
> effect of increasing the default number of partitions (1) for any of the 
> caches (list, compressed tree, expanded tree)? It's not documented in 
> the Admin docs.

David,

The admin guide does describe the caches - very briefly - on p19:

> You can change the value of list cache size, compressed tree cache size
> and expanded tree cache size or leave the defaults. They specify the
> amount of memory dedicated to caching term list, tree data in compressed
> form and tree data in expanded form.

The admin help tab says pretty much the same things:

> # list cache size specifies the amount of memory to dedicate to caching
> termlist data for all on-disk stands.
> # compressed tree cache size specifies the amount of memory to dedicate
> to caching tree data in compressed form for all on-disk stands.
> # expanded tree cache size specifies the amount of memory to dedicate to
> caching tree data in expanded form for the query evaluator.

You might prefer to think of "tree data" as "DOM structures", and 
"termlist data" as "searchable terms". The units, as mentioned on the 
form, are megabytes (to be pedantic, I believe that the units are MiB).

-- Mike


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