On Thu, 25 May 2023 at 05:45, Bruce Momjian <br...@momjian.us> wrote: > > On Wed, May 24, 2023 at 01:43:50PM -0400, Bruce Momjian wrote: > > > * Reduce palloc() memory overhead for all memory allocations down to 8 > > > bytes on all platforms. (Andres Freund, David Rowley) > > > > > > This allows more efficient use of memory and is especially useful in > > > queries which perform operations (such as sorting or hashing) that > > > require more than work_mem. > > > > Well, this would go in the source code section, but it seems too > > internal and global to mention. > > What was the previous memory allocation overhead?
On 64-bit builds, it was 16 bytes for AllocSet contexts, 24 bytes for generation contexts and 16 bytes for slab contexts. David
