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</o:shapelayout></xml><![endif]--></head><body lang=ZH-TW link=blue vlink=purple style='text-justify-trim:punctuation'><div class=WordSection1><p class=MsoPlainText><span lang=EN-US>Thanks Fajar for quick response!<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US><o:p> </o:p></span></p><p class=MsoPlainText><span lang=EN-US>Now I know there exists mutual influence among virtual servers. <o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US>Oddly, instead of seeing the error message " There are no DB handles to use ", there are bulk of "Discarding duplicate request from NMS - ID xx due to unfinished request xxxx", then after about short period of time, it showed msg "WARNING: Unresponsive child for request xxxx, in component authorized module", can I still say that is due to problematic DB? <o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US><o:p> </o:p></span></p><p class=MsoPlainText><span lang=EN-US><o:p> </o:p></span></p><p class=MsoPlainText><span lang=EN-US><o:p> </o:p></span></p><p class=MsoPlainText><span lang=EN-US><o:p> </o:p></span></p><p class=MsoPlainText><span lang=EN-US>> > That is, even virtual server ?A? only has few operation to check, <o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US>> > while ?B? has much more things need to check and unfortunately maybe <o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US>> > it could have low performance DB backend, does B might occupy <o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US>> > resource in whole Authorize section so that A also become more and more busier?<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US>> ><o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US>> > **<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US>> ><o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US>> <o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US>> Yes<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US>> <o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US>> <o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US>> > **<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US>> ><o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US>> > In fact, I got many times of Error msg ?child is hung for request in <o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US>> > component authorize module? in radius.log. I would not think the <o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US>> > loading in our server was really much high enough for causing late <o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US>> > response to simulated request from our NMS per **minute**. Our wifi <o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US>> > auth request per day is among 2000~3000 in average.<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US>> ><o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US>> <o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US>> only 2k per day? That's tiny. Something if seriously wrong with your <o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US>> db if it can't handle that much requests.<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US>> <o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US>> IIRC one way to isolate problematic db is to use small num_sql_socks <o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US>> in sql.conf (default is 5). If the db is slow, it should bomb out <o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US>> quickly with "There are no DB handles to use" errors, but there should <o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US>> be only a small count of FR threads interacting with that db so that <o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US>> processes not using it (e.g. other virtual server) should still work just fine.<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US>> <o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US>> --<o:p></o:p></span></p><p class=MsoPlainText><span lang=EN-US>> Fajar<o:p></o:p></span></p><p class=MsoNormal><span lang=EN-US><o:p> </o:p></span></p></div></body></html>