Re: requested shared memory size overflows size_t

Thanks. I will try with a more sensible value of wal_buffers.. I was
hoping to keep more in memory and therefore reduce the frequency of disk
IOs..

Any suggestions for good monitoring software for linux?

On 15/06/2010 00:08, Robert Haas wrote:
> On Mon, Jun 14, 2010 at 2:53 PM, Tom Wilcox<hungrytom(at)gmail(dot)com> wrote:
>
>> maintenance_work_mem=4GB
>> work_mem=4GB
>> shared_buffers=4GB
>> effective_cache_size=4GB
>> wal_buffers=1GB
>>
> It's pretty easy to drive your system into swap with such a large
> value for work_mem - you'd better monitor that carefully.
>
> The default value for wal_buffers is 64kB. I can't imagine why you'd
> need to increase that by four orders of magnitude. I'm not sure
> whether it will cause you a problem or not, but you're allocating
> quite a lot of shared memory that way that you might not really need.
>
>