Sushil Shirodkar wrote: > > On Thu, Apr 26, 2018 at 10:31 AM, Sushil Shirodkar <sushilps@xxxxxxxxxxx> wrote: > > > Running "vacuumdb -a -z -v" from the cron on one of our test environment, and > > > noticed that memory of the server goes down from 3.4GB free to 150MB. Once > > > the process is over, memory is not released, is it normal or something needs to be > > > changed ? also other processes start running slow afterwards due to low memory. > > > > How are you measuring free memory? Memory might be listed in cached/buffers instead of > > free but is still available. Although that wouldn't then explain other processes being slow. > > I have put some small script which runs in a loop with "free -h" command, > while I am running "vacuumdb". Once I clear by "sync" or bounce PG, > everything runs normal afterward. Then I would say everything is fine. It is normal for a Linux system to have almost no free memory; the memory is used for the file system cache. Do you experience any problems, like reduced performance or high I/O? Yours, Laurenz Albe -- Cybertec | https://www.cybertec-postgresql.com
