I'm applying an ILM policy on older (daily) indices. In warm phase I have enabled forcemerge to reduce the number of segments.
If I assign the ILM policy to multiple indices, say 30 days, will the forcemerge run on all the indices at the same time, or does Elastic handle this 1 at a time?
The reason I'm asking is because if Elastic would run all forcemerge at the same time, I figure this will result in high fragmentation of the files on disk.
(ELK 7.4.2 on Windows 2021R2)