Re: default resource limits

Tom Lane wrote:

>Andrew Dunstan <andrew@dunslane.net> writes:
>  
>
>>Nearly everyone seems to agree that the default for max_fsm_pages is 
>>woefully low, so I would like to have the default for this set 
>>unconditionally to 200,000 rather than 20,000. The cost would be just 
>>over 1Mb of shared memory, if the docs are correct. Alternatively, we 
>>could put this into the mix that is calculated by initdb, scaling it 
>>linearly with shared_buffers (but with the default still at 200,000).
>>    
>>
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>>I would also like to propose a more modest increase in max_connections 
>>and shared_buffers by a factor of 3.
>>    
>>
>
>I don't mind having initdb try larger values to see if they work, but
>if you are suggesting that we try to force adoption of larger settings
>I'll resist it.
>  
>

OK, works for me. The only thing I suggested might be set in stone was 
max_fsm_pages; I always envisioned the others being tested as now by initdb.

>"Factor of three" seems mighty weird.  The existing numbers (100 and 1000)
>at least have the defensibility of being round.
>
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What numbers would you like? If what I suggested seems odd, how about 
targets of 400 connections, 4000 shared_buffers and 200,000 max_fsm_pages?

cheers

andrew