Thanks Karl, Yes wrongly pasted...these are below outputs.
*MariaDB Version:* 10.2.39
*Server with Java application *
sys> free
total used free shared buff/cache
available
Mem: 128755 37957 632 944 90165
89082
Swap: 4095 28 4067
*Server with MariaDB *
sys> free
total used free shared buff/cache
available
Mem: 128755 125171 606 118 2977
2694
Swap: 65535 9746 55789
Regards,
Ragul
On Wed, Nov 10, 2021 at 3:43 PM Karl Levik <karl.le...@gmail.com> wrote:
> Hi Ragul,
>
> Which version of MariaDB is this?
>
> The memory utilisation you show for 'Server with MariaDB' is identical to
> 'Server with Java application', so I think you pasted in the wrong 'free'
> output for one of them?
>
> Cheers,
> Karl
>
> On Tue, 9 Nov 2021 at 16:13, ragul rangarajan <ragulrangara...@gmail.com>
> wrote:
>
>> Hi Team,
>>
>>
>> Need clarification on Memory utilization of Mariadb.
>>
>>
>> I have a java application with MariaDB that runs on the same Rhel 7
>> server with physical memory(RAM) allocated as 12GB where I would see the
>> normal utilization at the start as below.
>>
>>
>> *sys> free -h*
>>
>> * total used free shared buff/cache
>> available*
>>
>> *Mem: 11G 7.8G 1.6G 9.0M
>> 2.2G 3.5G*
>>
>> *Swap: 0B 0B 0B*
>>
>>
>> Over a period of time say >6month, I could see the RAM utilization is
>> almost full, and available space is very less but still, the application
>> continues to work fine without any issues.
>>
>>
>> *sys> free -h*
>>
>> * total used free shared buff/cache
>> available*
>>
>> *Mem: 11G 11G 134M 17M
>> 411M 240M*
>>
>> *Swap: 0B 0B 0B*
>>
>>
>> I don't see any OOM issue or high usage of RSS at the java application
>> level but I could see MariaDB occupies huge memory.... apart from that
>> overall application runs fine.
>>
>>
>> To ensure this we observed memory utilization at the large-scale
>> application servers where we deployed MariaDB and Java applications into
>> different servers with 128GB each and could observe that the system with
>> MariaDB uses full RAM size whereas the Java application consumption looks
>> stable.
>>
>>
>>
>> *Server with Java application*
>>
>> sys> free
>>
>> total used free shared buff/cache
>> available
>>
>> Mem: 128755 125171 606 118
>> 2977 2694
>>
>> Swap: 65535 9746 55789
>>
>>
>> *Server with MariaDB*
>>
>> sys> free
>>
>> total used free shared buff/cache
>> available
>>
>> Mem: 128755 125171 606 118
>> 2977 2694
>>
>> Swap: 65535 9746 55789
>>
>>
>> *MariaDb conf:*
>>
>> innodb_buffer_pool_size=102G
>> innodb_buffer_pool_instances=8
>> innodb_io_capacity=3000
>> innodb_log_buffer_size=8M
>> innodb_log_file_size=2047MB
>> innodb_log_files_in_group=2
>>
>> Is this expected that MariaDB consumes overall memory and manages within
>> RAM size.... regardless of buffer size configured?
>>
>> Do we need to optimize any configuration to control the MariaDB
>> consumption apart from buffer pool size?
>>
>>
>> Thanks and Regards,
>>
>> Ragul
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