Agreed. I was just speculating; may be I over -speculated it ;) Regards, Shreyas On Fri, Jun 11, 2010 at 8:18 PM, Ashley Sheridan <ash@xxxxxxxxxxxxxxxxxxxx>wrote: > On Fri, 2010-06-11 at 19:56 +0530, Shreyas wrote: > > I agree with Ash's comment. > > You should probably dig in deeper and see if those IPs are indeed valid. > Given the way the sites are being attacked (DDoS, SQL Injection et al), you > could be seeing one. If you see a high load and your website is accessed by > users spread globally, you should try out a Content Delivery Network like > Akamai to meet the scale and improve the performance of your web-site > without compromising on the end-user's site navigation experience. > > Regards, > Shreyas > > On Fri, Jun 11, 2010 at 3:06 PM, Ashley Sheridan > <ash@xxxxxxxxxxxxxxxxxxxx>wrote: > > > On Fri, 2010-06-11 at 15:13 +0530, Peter wrote: > > > > > Hi Ashley, > > > > > > Thanks for your answer. > > > > > > When too many users log in at the same time, the server gets loaded > > > with multiple sessions files that leads to complexity and crashes the > > > server. In such cases how do we handle this ? > > > > > > Thanks in advance > > > > > > Peter > > > > > > > > > Ashley Sheridan wrote: > > > > > > > On Fri, 2010-06-11 at 13:01 +0530, Peter wrote: > > > > > > > > > > > > > > > > > Hi All, > > > > > > > > > > My Question is "How does php server identify that the particular > > session > > > > > belongs to particular user?" > > > > > > > > > > Please help me out > > > > > > > > > > Regards > > > > > Peter.m > > > > > > > > > > > > > > > > > > > > > > > > > > All the session data is stored on the server either in a database, file > > > > or memory against a unique ID value. The server handles how this is > > > > done, and it's likely you won't ever need to get involved with changing > > > > how it does things. > > > > > > > > >From the client-side of things; the user agent (browser) sends this > > > > unique ID either as part of the URL or with the headers as a post > > > > variable, which is why you may see a PHP_SESSION_ID (or something > > > > similar) index in the $_REQUEST array when you use session_start() in > > > > your scripts. > > > > > > > > Has this helped? > > > > > > > > Thanks, > > > > Ash > > > > http://www.ashleysheridan.co.uk > > > > > > > > > > > > > > > > > > > > > > I don't think it's the sessions that are crashing your server, it's more > > than likely something else. What is the server load when you notice the > > crashes? How many people are visiting your site simultaneously at that > > point? > > > > Thanks, > > Ash > > http://www.ashleysheridan.co.uk > > > > > > > > > > > It might not even be as bad as that. It could be that you're just hitting > the max number of connections that the server is configured to handle, or > that the current number of connections is reaching the memory limit. > > Maybe the sessions are set up to be stored in files on the server on a > separate partition, and that has reached capacity? > > There are a number of reasons which could cause the server to appear that > the sessions are causing a problem that is not a DDoS attack ;) > > > Thanks, > Ash > http://www.ashleysheridan.co.uk > > > -- Regards, Shreyas
