Re: [Postgres-xc-general] Postgresql - Postgres-XC

On Sun, Dec 30, 2012 at 8:40 AM, Michael Paquier
<mic...@gm...>wrote:

>
>
> On Sun, Dec 30, 2012 at 2:59 AM, Iwan Sofana <iwa...@ya...> wrote:
>
>> Hi Michael,
>>
>> Thank you for comprehensive explanation.
>>
>> About 2 months ago, we start using PostgreSQL on 4 Core
>> Xeon. The size of database now increase up to 800 GB and CPU utilization
>> is about 40-60%.
>>
> I heard the limit of a Postgres database is 2TB somewhere so you still got
> some time until reaching that but yes the CPU might become a bottleneck if
> the use rate has such an average.
>

The limit to a single table in PostgreSQL is 32TB so 800GB is still only a
moderately sized database. What is the application doing to produce such a
high CPU load? Is it many concurrent users? A lot of large sorts? etc?
Understanding why the CPU is high will help determine if XC is the right
solution to solve your problem. It could be that some simple tuning or
database maintenance could reduce the CPU load and delay your need to move
beyond a single server.


>
>
>> I am not sure the server is strong enough for next two/three months.
>> I just thinking to replace it with a new one.
>> But by doing this the old server become useable.
>> It seems I need write scalability clustering.
>>
> Does your system use heavily read or write operations?
> The tables that are heavily read would need to be replicated to share the
> read load between nodes and the tables being written a lot would need to be
> distributed.
> --
> Michael Paquier
> http://michael.otacoo.com
>
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