[?? Probable Spam] Re: about "connection_pool_size" and "request_pool_size"

arlene chen arlenecc at incesoft.com
Thu Dec 27 06:14:26 MSK 2007

Igor Sysoev 写道:
> On Wed, Dec 26, 2007 at 11:36:47PM +0800, arlene chen wrote:
>>    who know the exact mean of  "connection_pool_size" and 
>> "request_pool_size",I  try to find it in  nginx document  but  it it not 
>> listed in module reference ,and I can not search it in nginx wiki too. 
>> Finally I search it from  nginx's  source code, only  two xx.c   used 
>> these parameter , but I can  not find out the exact mean of these two 
>> parameters, so I need to know  how these two parameters are defined and 
>> the most thing is they are used for what?
> The pools are used to allocate memory per connection and request.
> The pools are used for small allocations. If a block is bigger than
> pool size or bigger than page size, then it is allocted outside the pool.
> If there is not enough memory for small allocation inside pool, then
> a new block of the same pool size is allocated.
the default setting of connection_pool_size is 256 byte ,and the default 
setting of request_pool_size is 4k, can I think that the 
connection_pool_size is just used to maintain the socket connection and 
and the request_pool_size is just used to cache the http request header, 
the output_buffer is used to http response, so the connection_pool_size 
and request_pool_size have not effect on the performance of nginx or the 
effect is very small?

      best regards,

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