Re: Does larger i/o size make sense?

>> Would it make sense to have something easier to configure that recompiling
>> postgresql and managing a custom executable, say a block size that could be
>> configured from initdb and/or postmaster.conf, or maybe per-object settings
>> specified at creation time?
>>
> I love the idea of per-object block size setting according to expected workload;

My 0.02€: wait to see whether the idea get some positive feedback by core 
people before investing any time in that...

The per object would be a lot of work. A per initdb (so per cluster) 
setting (block size, wal size...) would much easier to implement, but it 
impacts for storage format.

> large tables, larger block size may have less pain than interruption per 8KB
> boundary to switch the block being currently focused on, even though random
> access via index scan loves smaller block size.

Yep, as Tom noted, this is really workload specific.

-- 
Fabien.