persistent-connection

I have 10 application servers and 1 mysql database. I would like to do connection pooling for mysql, but simply enabling mysql_pconnect() will not work since it'll cause some servers to have more connections than others. What's the best solution for this scenario..? Why do you want to use persistent connections? They are likely to cause trouble and will not improve performance noticeably (in all likelihood). Run some performance tests on production-grade hardware in your lab, and you'll see. 来源： https://stackoverflow.com/questions/2252612/mysql-persistent-connections

How can I write Http server in TornadoWeb that will support persistent Connections. I mean will be able to receive many requests and answer to them without closing connection. How does it actually work in async? I just want to know how to write handler to handle persistent connection. How actually would it work? I have handler like that: class MainHandler(RequestHandler): count = 0 @asynchronous def post(self): #get header content type content_type = self.request.headers.get('Content-Type') if not content_type in ACCEPTED_CONTENT: raise HTTPError(403, 'Incorrect content type') text = self

In push notification mechanisms, like Apple's Push Notification Service, they use persistent IP connections. My question is, how does employing persistent connections save battery and bandwidth of a device? I am under the impression that since the connection is persistent, then the device always uses the WiFi or 3G/LTE radio. I know that through persistent connections, you will not waste bandwidth by not asking the server for changes when there is none, and instead the server will "push" to you these changes. But, I don't see how that preserves battery and bandwidth (since you have an always

I've been struggling with an HTTP timeout issue recently. After more than one month of investigation I'm quite sure that it is caused by bad HTTP persistent connections. Details are as follows: It is an iOS app. Most users are running iOS 8. I'm using NSURLConnection . iOS 8 has one known keep alive bug but mine is a different issue. More specifically, that bug causes NSURLErrorNetworkConnectionLost but my error is NSURLErrorTimedOut . However, I'm not sure whether my issue is caused by another bug of iOS 8. The behavior of my issue: After some time of using — after some HTTP requests are

Is there any way to force NSURLConnection to not reuse the current persistent connection but to create a new one ? I am trying to defend myself from this known iOS8 keep-alive bug If iOS 8 receives a HTTP response with a Keep-Alive header, it keeps this connection to re-use later (as it should), but it keeps it for more than the timeout parameter of the Keep-Alive header and then when a second request comes it tries to re-use a connection that has been dropped by the server. I am looking for a way to solve this issue from Objective c rather than solving from server side. If any third party