Server error logs are generated by your web server. I think they’re usually in /etc/logs or something like that, but I suppose that can change, depending on your setup. Anyway, there might be a helpful error message.
However, you could try this. Find this row in lib/indexing.php in the Relevanssi plugin folder:
function relevanssi_build_index($extend = false) {
And add this line right after it:
wp_suspend_cache_addition(true);
Then try to index. Might make a world of difference. 11 000 posts is quite a bit, but should not be too much – but a lot depends of course from the capabilities of your server.
Mikko,
I’m sure this is a great plugin for many people and you really are giving outstanding support. However, as I usually discover with big plugins like this, they are usually overkill for what I want to do and I end up adding a function/filter/action hook to my child theme’s functions.php file or modifying a much simpler plugin to get the results I need. So I’m choosing NOT to use this plugin and would really like an clean uninstall utility that completely removes all traces of options, metadata, database tables, files, etc. No offense, but it’s just not right for me.
I think I’m really good at creating or revealing bugs or incompatibilities among plugins. 🙂 So, for what it’s worth, I re-activated the plugin, (without the mod you suggested above) saved the settings (using minimal indexing) and then pressed the big green “Build the index” button. Well, it completed (after about a minute) with no errors but even after refreshing the settings page, there are no values in the “state of the index” section and there were no database tables created. Weird huh? So I obviously broke something.
I hope my feed back helps you be even more successful!
Relevanssi has a clean uninstall. Uninstall it using the WP uninstall feature, and everything should be gone.