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How much is Application Data
In a site that has about 4000 products, in 1000 categories, I thought that I
can store each product and category details in its own application("var"), instead of trips to the database. When someone will go to product.asp?id=123, the page will show the application("product123") instead of getting the information from the database. If a change of pricing or availability occours, I will delete the application("product123"). The product.asp will check if it's empty. If it is, it will get the data from the database and show that, but the next time someone goes to that page, there is no need to connect to the database. I've used it many times for chunks of HTML (see http://www.learnasp.com/freebook/asp/speedappdata.aspx), but my question is, how much can I save in application data? Can I put 4000 of them? Bruce wrote:
Show quote > In a site that has about 4000 products, in 1000 categories, I thought It depends on the server hardware (amount of RAM) and the number of > that I can store each product and category details in its own > application("var"), instead of trips to the database. > > When someone will go to product.asp?id=123, the page will show the > application("product123") instead of getting the information from the > database. > > If a change of pricing or availability occours, I will delete the > application("product123"). The product.asp will check if it's empty. > If it is, it will get the data from the database and show that, but > the next time someone goes to that page, there is no need to connect > to the database. > I've used it many times for chunks of HTML (see > http://www.learnasp.com/freebook/asp/speedappdata.aspx), but my > question is, how much can I save in application data? Can I put 4000 > of them? applications running on the server. This is the type of question that can only be answered by testing. For example, we have on idea how much memory is consumed by storing one of these productls, let alone 4000. If scalability is a concern, you should be striving to avoid page faults. The other concern is concurrency: I assume you have already realized the need to lock the application object while making changes to its contents. While the application is locked, no requests in the application can be served. Whether this is a concern or not depends on the frequency of price changes and can only be answered by testing. Is the call to the database so time-consuming that caching the data in application is necessary? -- Microsoft MVP - ASP/ASP.NET Please reply to the newsgroup. This email account is my spam trap so I don't check it very often. If you must reply off-line, then remove the "NO SPAM" Show quote
"Bob Barrows [MVP]" <reb01501@NOyahoo.SPAMcom> wrote in message Or just don't bother locking the application object. That'll be fine innews:OftlhwiHIHA.3400@TK2MSFTNGP03.phx.gbl... > Bruce wrote: > > In a site that has about 4000 products, in 1000 categories, I thought > > that I can store each product and category details in its own > > application("var"), instead of trips to the database. > > > > When someone will go to product.asp?id=123, the page will show the > > application("product123") instead of getting the information from the > > database. > > > > If a change of pricing or availability occours, I will delete the > > application("product123"). The product.asp will check if it's empty. > > If it is, it will get the data from the database and show that, but > > the next time someone goes to that page, there is no need to connect > > to the database. > > I've used it many times for chunks of HTML (see > > http://www.learnasp.com/freebook/asp/speedappdata.aspx), but my > > question is, how much can I save in application data? Can I put 4000 > > of them? > > It depends on the server hardware (amount of RAM) and the number of > applications running on the server. This is the type of question that can > only be answered by testing. For example, we have on idea how much memory is > consumed by storing one of these productls, let alone 4000. If scalability > is a concern, you should be striving to avoid page faults. > > The other concern is concurrency: I assume you have already realized the > need to lock the application object while making changes to its contents. > While the application is locked, no requests in the application can be > served. Whether this is a concern or not depends on the frequency of price > changes and can only be answered by testing. > this case. -- Anthony Jones - MVP ASP/ASP.NET Thanks for the response.
The site is hosted on a shared hosting (discount asp .net), where I don't hav control over testing and looking at the RAM etc. If every product is 3 KB of information, is that 4000*3 ? How would I test if caching is faster than connecting to a database? (I want to test speed of page load, and scalability). I've stumbled upon http://www.webgecko.com/products/aspcache/, is anyone familiar with that? The page claims that it's much faster than storing in application data, but I can't use it on a shared hosting :( Is there something else similar? Show quote "Bob Barrows [MVP]" <reb01501@NOyahoo.SPAMcom> wrote in message news:OftlhwiHIHA.3400@TK2MSFTNGP03.phx.gbl... > It depends on the server hardware (amount of RAM) and the number of > applications running on the server. This is the type of question that can > only be answered by testing. For example, we have on idea how much memory > is consumed by storing one of these productls, let alone 4000. If > scalability is a concern, you should be striving to avoid page faults. > > The other concern is concurrency: I assume you have already realized the > need to lock the application object while making changes to its contents. > While the application is locked, no requests in the application can be > served. Whether this is a concern or not depends on the frequency of price > changes and can only be answered by testing. > > Is the call to the database so time-consuming that caching the data in > application is necessary? Show quote
"Bruce" <fake_dont_send@anything_.com> wrote in message Yeah use ASP.NET and do things like Response caching.news:e%23AQu$LIIHA.4592@TK2MSFTNGP02.phx.gbl... > Thanks for the response. > > The site is hosted on a shared hosting (discount asp .net), where I don't > hav control over testing and looking at the RAM etc. If every product is 3 > KB of information, is that 4000*3 ? > > How would I test if caching is faster than connecting to a database? (I want > to test speed of page load, and scalability). > > I've stumbled upon http://www.webgecko.com/products/aspcache/, is anyone > familiar with that? The page claims that it's much faster than storing in > application data, but I can't use it on a shared hosting :( Is there > something else similar? 12MB of product data is peanuts. If your concerned about performance then its more important to consider what the hit rate will be and how much CPU your ASP code is going to consume. -- Anthony Jones - MVP ASP/ASP.NET Another option is to use the FileSystem.Scripting object to generate a
static html version of each page, and show that. On each request. code can check for the presence of an html file, and if it exists, show it (include file, perhaps?), otherwise generate it from the database and show it. If you amend the details of any product, code will delete the associated html file. -- Mike Brind Show quote "Bruce" <fake_dont_send@anything_.com> wrote in message news:e%23AQu$LIIHA.4592@TK2MSFTNGP02.phx.gbl... > Thanks for the response. > > The site is hosted on a shared hosting (discount asp .net), where I don't > hav control over testing and looking at the RAM etc. If every product is 3 > KB of information, is that 4000*3 ? > > How would I test if caching is faster than connecting to a database? (I > want to test speed of page load, and scalability). > > I've stumbled upon http://www.webgecko.com/products/aspcache/, is anyone > familiar with that? The page claims that it's much faster than storing in > application data, but I can't use it on a shared hosting :( Is there > something else similar? > > > "Bob Barrows [MVP]" <reb01501@NOyahoo.SPAMcom> wrote in message > news:OftlhwiHIHA.3400@TK2MSFTNGP03.phx.gbl... > >> It depends on the server hardware (amount of RAM) and the number of >> applications running on the server. This is the type of question that can >> only be answered by testing. For example, we have on idea how much memory >> is consumed by storing one of these productls, let alone 4000. If >> scalability is a concern, you should be striving to avoid page faults. >> >> The other concern is concurrency: I assume you have already realized the >> need to lock the application object while making changes to its contents. >> While the application is locked, no requests in the application can be >> served. Whether this is a concern or not depends on the frequency of >> price changes and can only be answered by testing. >> >> Is the call to the database so time-consuming that caching the data in >> application is necessary? > > Maybe not include files. You can't set their value dynamically. But
Server.Transfer would work. Show quote "Mike Brind" <du***@newsgroups.com> wrote in message news:O4yKVJVIIHA.1316@TK2MSFTNGP02.phx.gbl... > Another option is to use the FileSystem.Scripting object to generate a > static html version of each page, and show that. On each request. code > can check for the presence of an html file, and if it exists, show it > (include file, perhaps?), otherwise generate it from the database and show > it. If you amend the details of any product, code will delete the > associated html file. > > -- > Mike Brind > > "Bruce" <fake_dont_send@anything_.com> wrote in message > news:e%23AQu$LIIHA.4592@TK2MSFTNGP02.phx.gbl... >> Thanks for the response. >> >> The site is hosted on a shared hosting (discount asp .net), where I don't >> hav control over testing and looking at the RAM etc. If every product is >> 3 KB of information, is that 4000*3 ? >> >> How would I test if caching is faster than connecting to a database? (I >> want to test speed of page load, and scalability). >> >> I've stumbled upon http://www.webgecko.com/products/aspcache/, is anyone >> familiar with that? The page claims that it's much faster than storing in >> application data, but I can't use it on a shared hosting :( Is there >> something else similar? >> >> >> "Bob Barrows [MVP]" <reb01501@NOyahoo.SPAMcom> wrote in message >> news:OftlhwiHIHA.3400@TK2MSFTNGP03.phx.gbl... >> >>> It depends on the server hardware (amount of RAM) and the number of >>> applications running on the server. This is the type of question that >>> can only be answered by testing. For example, we have on idea how much >>> memory is consumed by storing one of these productls, let alone 4000. If >>> scalability is a concern, you should be striving to avoid page faults. >>> >>> The other concern is concurrency: I assume you have already realized the >>> need to lock the application object while making changes to its >>> contents. While the application is locked, no requests in the >>> application can be served. Whether this is a concern or not depends on >>> the frequency of price changes and can only be answered by testing. >>> >>> Is the call to the database so time-consuming that caching the data in >>> application is necessary? >> >> > > Me and my spineroosms. Of course that should have been
Scripting.FileSystemObject. Show quote "Mike Brind" <du***@newsgroups.com> wrote in message news:uuvbEOVIIHA.1324@TK2MSFTNGP06.phx.gbl... > Maybe not include files. You can't set their value dynamically. But > Server.Transfer would work. > > > "Mike Brind" <du***@newsgroups.com> wrote in message > news:O4yKVJVIIHA.1316@TK2MSFTNGP02.phx.gbl... >> Another option is to use the FileSystem.Scripting object to generate a >> static html version of each page, and show that. On each request. code >> can check for the presence of an html file, and if it exists, show it >> (include file, perhaps?), otherwise generate it from the database and >> show it. If you amend the details of any product, code will delete the >> associated html file. >> >> -- >> Mike Brind >> >> "Bruce" <fake_dont_send@anything_.com> wrote in message >> news:e%23AQu$LIIHA.4592@TK2MSFTNGP02.phx.gbl... >>> Thanks for the response. >>> >>> The site is hosted on a shared hosting (discount asp .net), where I >>> don't hav control over testing and looking at the RAM etc. If every >>> product is 3 KB of information, is that 4000*3 ? >>> >>> How would I test if caching is faster than connecting to a database? (I >>> want to test speed of page load, and scalability). >>> >>> I've stumbled upon http://www.webgecko.com/products/aspcache/, is anyone >>> familiar with that? The page claims that it's much faster than storing >>> in application data, but I can't use it on a shared hosting :( Is there >>> something else similar? >>> >>> >>> "Bob Barrows [MVP]" <reb01501@NOyahoo.SPAMcom> wrote in message >>> news:OftlhwiHIHA.3400@TK2MSFTNGP03.phx.gbl... >>> >>>> It depends on the server hardware (amount of RAM) and the number of >>>> applications running on the server. This is the type of question that >>>> can only be answered by testing. For example, we have on idea how much >>>> memory is consumed by storing one of these productls, let alone 4000. >>>> If scalability is a concern, you should be striving to avoid page >>>> faults. >>>> >>>> The other concern is concurrency: I assume you have already realized >>>> the need to lock the application object while making changes to its >>>> contents. While the application is locked, no requests in the >>>> application can be served. Whether this is a concern or not depends on >>>> the frequency of price changes and can only be answered by testing. >>>> >>>> Is the call to the database so time-consuming that caching the data in >>>> application is necessary? >>> >>> >> >> > >  
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