On 3/28/21 4:58 AM, Tony Liu wrote:
I don't see any problems yet. All OSDs are working
fine.
Just that 1.8GB free memory concerns me.
I know 256GB memory for 10 OSDs (16TB HDD) is a lot, I am planning to
reduce it or increate osd_memory_target (if that's what you meant) to
boost performance. But before doing that, I'd like to understand what's
taking so much buff/cache and if there is any option to control it.
You can enable /disable bluefs_buffered_io (true / false). It was the
default for a long time. It has been disabled for some time due to a RGW
issue. But I believe it has been re-enabled again. I would leave it on.
I would find a lot of unused memory an issue. Linux wil generally use as
much memory to buffer / cache as possible.
Gr. Stefan