Hi Sylvain, if you are talking about the Exclude from Search
checkbox at Navigation tab > Search & SEO of pages module, you should be on the wrong spot. That checkbox is for SEO use only.
If you want to exclude the specific node, you should update your search index > exclude scope > add exclude by selecting the node.
Also, each smart search index will be adding item upon the node published after when all index scope matched. If you does not want to index/process any logged search tasks after it logged immediately, you can apply appSettings at web config CMSProcessSearchTasksByScheduler
set to true, then update the scheduled task Execute local search index
execute frequency.
In addition, you for large attachments, you can ignore to index them if you have enough other description fields for your index use. Update web config appSettings CMSSearchMaxAttachmentSize
to avoid the large attachment kill your index process because of out of memory. also, CMSSearchDetectTextEncoding
can help improve indexing PDF files if any file the encoding is using other than UTF-8.
for more information about search settings by web config, please see Smart search settings.
System will not auto rebuild index unless you build a custom scheduled task to do.