Re: LDBM recommended Setting

[Mark Reynolds]

On 08/14/2018 11:32 AM, Paul Whitney wrote:
>  Hi guys,
>
>  Am looking to improve performance in my 389 DS deployment.  In 
>  reviewing the documentation, the recommended size for the LDBM cache 
>  is the sum of the backend database + 15% of the backend database.  For 
>  me that comes out to almost 27GB.  Seems high considering the database 
>  cache is set very high as well. Is that a recommended setting or is 
>  there a better practice? 
Well the more of the database you can keep in the cache
the better the 
performance.   However, you are talking about the same cache: LDBM cache 
is the same thing as the database cache.

But you should also include the entry cache for your database.  So you 
almost want to double that to 50GB total ;-)    27 GB for DB cache, and 
20 GB for entry cache (this varies of course for the entry cache and it 
will probably be less than 20GB, but you won't know until you start 
priming the entry cache and checking the database monitor - trying to 
achieve 99% cache hit ratio).

Mark
>  Thanks,
>
>  Paul M. Whitney
>
>
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