[rabbitmq-discuss] |Spam| question about rabbitmq TPS

Fri Mar 30 14:27:15 BST 2012

So, what do you think is happening, given that spikes also occur when
persistence is off?

2012/3/29 陈鸿钦 <chen-hongqin at 163.com>

> figure 1
>  figure 2
>
>  figure 3
>
> Hi, I create 15 queues in the first case, and create 300 queues in the
> second case. Each message is acknowledged before sending the next one.
> Figure 3 illustrates the detail of figure2 when i remove the several top
> points.
>
>
>
> 在 2012-03-29 22:53:39，"Alexis Richardson" <alexis at rabbitmq.com> 写道：
>
> try it without persistence and see what graphs you get..?
>
>
> 2012/3/29 陈鸿钦 <chen-hongqin at 163.com>
>
>> yes, all the messages are persistent
>>
>>
>> 在 2012-03-29 21:17:04，"Alexis Richardson" <alexis at rabbitmq.com> 写道：
>>
>> are you using persistent messages?
>>
>>
>> 2012/3/29 陈鸿钦 <chen-hongqin at 163.com>
>>
>>>  This is about my master paper which is related with availability, and
>>> I use rabbitmq as the middle-ware component. So I am trying to find how can
>>> cause this problem. And my current answer I guess is that it is caused by
>>> the OS cache. Cache hit ratio is high at the very start and becomes lower
>>> because of the page replacement after more and more requests come. And the
>>> other reason maybe is messages are orderly sufficiently for the disk to
>>> write at start. But i am not sure if the rabbitmq has do some optimals for
>>> that?
>>>  At 2012-03-29 18:23:33,"Alexis Richardson" <alexis at rabbitmq.com> wrote:
>>>
>>> Hi,
>>>
>>> There are lots of possible reasons for this, including that "measuring
>>> anything accurately is hard".
>>>
>>> What problem are you trying to solve?
>>>
>>> alexis
>>>
>>>
>>> 2012/3/26 陈鸿钦 <chen-hongqin at 163.com>
>>>
>>>>   hi,
>>>> can you tell me why TPS is too high at first and sometimes maybe even
>>>> more higher(maybe over 30000/s) when I send messages to rabbitmq cluster
>>>> concurrently? thanks!
>>>>
>>>>
>>>>
>>>> Some infos about this test:
>>>> 1. all the messages are same and each message size is 1kb.
>>>>  2. 300 queues created by multiple Producers at start and messages
>>>> sent to the queues are random
>>>> 3. All messages are persistent and queues are all durable
>>>> 4. 3 nodes consists of a rabbitmq cluster and all the nodes are in the
>>>> same host but different ports
>>>> the host info:
>>>>
>>>> JAVA version****
>>>>
>>>> Java version "1.6.0_12" Java(TM) SE Runtime Environment (build
>>>> 1.6.0_12-b04)****
>>>>
>>>> JAVA VM
>>>>
>>>> Java HotSpot(TM) 64-Bit Server VM (build 11.2-b01, mixed mode)****
>>>>
>>>> CPU****
>>>>
>>>> Intel(R) Xeon(R) CPU E5504 @2.00GHz****
>>>>
>>>> number of cores
>>>>
>>>> 8
>>>>
>>>> memory****
>>>>
>>>> 33011192kb****
>>>>
>>>> Erlang VM
>>>>
>>>> Erlang R15B (erts-5.9) [source] [64-bit] [smp:8:8] [async-threads:0]
>>>> [hipe] [kernel-poll:false]****
>>>>
>>>> RabbitMQ version
>>>>
>>>> Release 2.7.1****
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>> _______________________________________________
>>>> rabbitmq-discuss mailing list
>>>> rabbitmq-discuss at lists.rabbitmq.com
>>>> https://lists.rabbitmq.com/cgi-bin/mailman/listinfo/rabbitmq-discuss
>>>>
>>>>
>>>
>>>
>>>
>>
>>
>>
>
>
>
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