Reindex to the index with default refresh_interval (null) could speedup reindex speed and decrease CPU usage.
Could be implemented as automation for the following steps:
Start reindex
Check the refresh_interval in the destintaion index settings
If refresh_interval exists -> set refresh_interval to null
After the end of the proccess return the refresh_interval to original value
Reindex to the index with default refresh_interval (null) could speedup reindex speed and decrease CPU usage. Could be implemented as automation for the following steps: