[Freeipa-devel] LDAP Queue Length Control for better LDAP client performance?

[Ludwig Krispenz]

On 03/13/2014 03:20 PM, Rich Megginson wrote:
> On 03/13/2014 03:08 AM, Petr Spacek wrote:
>> Hello list,
>>
>> my journey to the IETF wonderland revealed one more RFC draft:
>>
>> LDAP Queue Length Control
>> http://tools.ietf.org/html/draft-hollstein-queuelength-control-01
>>
>> I have no idea if this can really improve LDAP client performance or 
>> not but IMHO it is worth exploring it.
>>
>> Maybe only an IPA replica with thousands of SSSD clients could 
>> benefit from it, I don't know.
>>
>> I have finally ran out of notes from yesterday so you don't need to 
>> worry about more RFC drafts - today :-)
>>
>
> 389 allows you to turn on and off TCP Nagle (TCP_NODELAY) and 
> TCP_CORK.  Someone could try running different workloads with 
> different settings for these to see if it makes a difference.
and we haven't been able so far to find a setup which really shows a 
difference of the settings.
In this draft the control of behaviour  is moved up to the ldap layer 
and I have doubts that it will give a measurable effect, in general it 
introduces some overhead to check if the contropl is set, to buffer the 
responses,... , which might be low but affects all connections
>
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