From #oracle this morning:
06:55 the PGA was set to 8Gb
06:55 which I recommended to be brought down to 2Gb
06:55 thought it would be enough
06:55 easy to check
06:56 just query the view v$pga_target_advice06:58 you have to manually size the individual custom caches
06:58 it’s subtracted from the total sga
06:59 you can monitor where it takes the memory in v$sga_resize_ops