RE: Protect syscache from bloating with negative cache entries

From: Bruce Momjian [mailto:bruce@momjian.us]
> > That being said, having a "minimal size" threshold before starting with
> > the time-based eviction may be a good idea.
> 
> Agreed.  I see the minimal size as a way to keep the systems tables in
> cache, which we know we will need for the next query.

Isn't it the maximum size, not minimal size?  Maximum size allows to keep desired amount of system tables in memory as
wellas to control memory consumption to avoid out-of-memory errors (OS crash!).  I'm wondering why people want to take
adifferent approach to catcatch, which is unlike other PostgreSQL memory e.g. shared_buffers, temp_buffers, SLRU
buffers,work_mem, and other DBMSs.
 


Regards
Takayuki Tsunakawa