Snapshots are probably actually caused by a spike in disk IO and disk latency, not GC (you'll see longer STW pauses as you get to a safepoint if that disk is hanging). This is especially problematic on SATA SSDs, or nVME SSDs with poor IO scheduler tuning. There's a patch somewhere to throttle hardlinks to try to mitigate this.
On Mon, Sep 19, 2022 at 3:45 AM Michail Kotsiouros via user < user@cassandra.apache.org> wrote: > Hello community, > > I observe some GC pauses while trying to create snapshots of a keyspace. > The GC pauses as such are not long, even though they are reported in logs. > The problem is the CPU utilization which affects other applications > deployed in my server. > > Do you have any articles or recommendations about tuning GC in Cassandra? > > > > Thank you in advance. > > BR > > MK >
