Re: Different memory allocation strategy in Postgres 11?

Jeff Janes schrieb am 26.10.2018 um 17:42:
>     I typically configure "shared_buffers = 4096MB" on my 16GB system as sometimes when testing, it pays off to have
abigger cache.
 
> 
>     With Postgres 10 and earlier, the Postgres process(es) would only allocate that memory from the operating system
whenneeded.
 
>     So right after startup, it would only consume several hundred MB, not the entire 4GB
> 
>     However with Postgres 11 I noticed that it immediately grabs the complete memory configured for shared_buffers
duringstartup.
 
> 
>     It's not really a big deal, but I wonder if that is an intentional change or a result from something else?
> 
> 
> Do you have pg_prewarm in shared_preload_libraries?

No. The only shared libraries are those for pg_stat_statemens