Looking for solution to described issue.
When run the reindexing from the admin panel page freeze.
I was not able to move to different option in admin panel until the reindexing process (I think) ended.
Admin panel on other tab also freeze until (again I think) end od reindexing process.
Magento runs on (AWS ECS) on EC2 - Ver 2.4.6; PHP 8.2.8; Nginx 1.25
Varnish 7.3.0 (AWS ECS) on EC2 under Elastic Load Balancer (AWS)
Opensearch 1.3 (AWS)
It is best practice to set your indexes on update by schedule. - https://experienceleague.adobe.com/docs/commerce-operations/implementation-playbook/best-practices/m...
I have update on schedule, but sometimes needs to update immediately.
You can run a SSH command to update indexes:
php bin/magento indexer:reindex
It wouldn't freeze that way