Re: reduced DEFAULT_SEARCH_STACK_DEPTH

[Howard Chu <hyc@symas.com>]

Suhel Momin wrote:
> Hi,
>
> I want to understand what is the impact of changing following #defines
>
> #define DEFAULT_SEARCH_STACK_DEPTH 16
> #define MINIMUM_SEARCH_STACK_DEPTH 8
>
> I can see that this value is used to allocate search_stack.
>
> I modified these values to
>
> #define DEFAULT_SEARCH_STACK_DEPTH 4
> #define MINIMUM_SEARCH_STACK_DEPTH 2
>
> This helped in reducing memory footprint however I am not sure about the
> wide range impact.

The MINIMUM is a hard limit; the search code expects it to be at least 8. 
Anything smaller will cause a SEGV. Never change these definitions. The whole 
reason there is a "searchstack" config keyword is so that you can safely 
reconfigure this value without changing the code.

The comment on MINIMUM is "The minimum we can function with" - do you think 
we're lying when we write comments like that?
--
  -- Howard Chu
  CTO, Symas Corp.           http://www.symas.com
  Director, Highland Sun     http://highlandsun.com/hyc/
  Chief Architect, OpenLDAP  http://www.openldap.org/project/