SSCCE of running a 100k+ SOSL query

ExecuteAnonymous.java

String[] objects = new String[0];
Set<String> exceptions = new Set<String> { 'caseexternaldocument' };
for(sObjectType t: Schema.getGlobalDescribe().values()) {
	DescribeSObjectResult r = t.getDescribe();
    if(r.isSearchable() && !exceptions.contains((''+t).toLowerCase())) {
        objects.add(t+'('+string.join(r.fields.getMap().keySet(),',')+')');
    }
}
String searchTerm = 'find {demo} in all fields returning '+string.join(objects,',');
System.debug(searchTerm.length());
Search.find(searchTerm);