Hi i have a system which parse XML file with news. It gets it of article in database and then if it not there it add to database. But the problem is to many connection because it check every 15 minutes and it have 30 queries to database. So i thinking to make some cache for it maybe save last answer from XML and compare to new one and if it now the same then it begin checking. Or i thinking create some TXT file with all id of articles and then compare it to it. What else you can recommend what can help me ?