@Sem Nick

This plugin hasn't been updated for Elgg 6.2/6.3 yet. 
I'll release it very soon. 

Please disable this plugin for now to check if the issue is specific to it. 
Thanks for reporting.

You're right, the plugin works fine on Elgg 6.2, but has problems with Elgg 6.3.

Plugin [custom_index] with version: 6.2.5 conflicts with constraint *

i dont know what i must do

Plugin [custom_index] with version: 6.2.5 conflicts with constraint *

i dont know what i must do

Just look at the description: https://elgg.org/plugins/3265187

Conflicts with Front Page Demo aka custom_index bundled plugin.

You must disable Front Page Demo plugin.

It's not possible to add custom params from you seeder class (as that isn't the cli command).

You could extend/overrule the core seeder command to support your additional params. Those would then also be available to all other seeders, but since they don't use it no harm.

Thanks

1- Use PhpMyAdmin tool

2- Some old tips. Note: be careful with this if you don't understand what you're doing.

Since Elgg is using InnoDB tables you can search how to optimize MySQL for that purpose. But a lot depends on your current setup.

If your on shared hosting with the webserver and database server on the same machine, moving the database to it's own dedicated machine will help. If you're already running the database in a cluster with 10 servers than there are different thing you should look at (but than you probably don't need our help ;)

Are you experiencing any performance issues?

If you have an active community moving the search feature out of the database to a search engine will free up a lot of resources for the 'normal' use of the database. You could look into using OpenSearch as a search engine and use this plugin https://elgg.org/plugins/3333727 to connect your Elgg installation to OpenSearch.