Re: [mosquitto-dev] Mosquitto broker consumes too much memory and never

[Roger Light <roger@xxxxxxxxxx>]

Hi Prashant,

Do you have some code you can share that helps.reproduce this?

I notice you're using mosquitto 1.3.1, could you try again using the 1.4 branch please?

Thanks,

Roger

On Jan 28, 2015 12:09 PM, "Prashant Kedia" <prashantkedia22@xxxxxxxxx> wrote:

Hi All,

Recently I observed that, on my test environment (AWS micro instance) some of the mosquitto brokers are consuming about more than 250 MB of memory.

I have done some analysis and found that it consumes more memory while publishing QoS 0 messages with log_type information.

Below are the results of analysis done on my local machine with a simple test case.

Platform: Linux Mint 17 Qiana

Mosquitto version: 1.3.1

Mqtt Client used: Paho APIs 1.0.1

Number of message published: 25000 X 5 (5 threads simultaneously publishing 25000 messages each, on the same broker, on the same topic)

Number of clients subscribed: 4

QoS	Log_Type	Memory	CPU %	Approx time for each thread to publish (millis)
0	Info	42 MB	84	5500
0	Debug	8.6 MB	32	3300
1	Info	11.7 MB	44	60000
1	Debug	6.2 MB	40	105000
2	Info	1.6 MB	8	430000
2	Debug	2.8 MB	8	218000

 

It does not even release consumed memory after all published messages are received by the client.

So, I want to know if there is any way, I can publish QoS 0 messages with log level info, without consuming so much memory.

And is there any way to make broker, to release the consumed memory once all messages are received.

Note: retained parameter is false while publishing messages.

--

Thanks and Regards,

Prashant Kedia

Co-Founder and Developer

Bizlers Technologies Pvt. Ltd.

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