On 24.03.20 19:46, Robert Haas wrote:
Do we use shared_buffers for WAL ?
No.
What's about the explanation in
https://www.postgresql.org/docs/12/runtime-config-wal.html :
"wal_buffers (integer) The amount of shared memory used for WAL data
that has not yet been written to disk. The default setting of -1 selects
a size equal to 1/32nd (about 3%) of shared_buffers, ... " ? My
understanding was, that the parameter wal_buffers grabs some of the
existing shared_buffers for its own purpose. Is this a
misinterpretation? Are shared_buffers and wal_buffers two different
shared memory areas?
Kind regards, Jürgen
