750 to 1200 line items per order

Question

Hi
Does any body have the experience of creating order with 750-1200 line items per order, in such scenario how the performance of the e-commerce was handled, was any custom development made to achieve.
please let us know
thanks
vignesh

Answer 1

Stefan, as stated, this was not well thought through solution (but with some work would be possible to achieve).
Regarding memory leaks. We have spent quite a bit of time looking in-depth at the shop code over the years and have so far seen very little evidence of actual memory leaks.
MASSIVE memory consumption, yes, definitely, but no actual leaks
If you have a suitable OS and JVM running that will allow you to crank up your JVM memory settings then you will most likely see that the memory usage will plateau...it might just be at a much higher level than you would have reasonably expected.
To give you an example. One of our customers was running a very large catalog (900 000 items) and the shop used 22 GB of memory when running. One of the main reasons in their case, with such a big catalog, was how the web shop chooses to create web cat items and cache them. Deep in the standard shop code you can find that there are lots and lots of ArrayLists initiated and they are all given a >0 default length, which consumes memory even when empty. In this particular case this became such a big issue that we sent SAP the proof that if they would initiate the ArrayLists with 0 length the memory consumption would drop significantly for each WebCatItem instance.
We estimated at the time after some in-place replacements of the CatalogAttributeValue, class out of the pcatAPI.jar where we set it by default to null instead of size of 10 that we would have saved about 40% of memory consumption. We even prepared the test case and sent it all to SAP, but don't think we ever got it implemented in standard code.
Another suggestion was that SAP would implement a LRU cache for catalog caching for larger catalogs....again would help with memory usage challenges.
With another customer we had 1 Million+ hits per business day (8 h period) and I can't remember us ever having to chase up memory leaks in the standard shop code...they might exist, but perhaps the usage scenarios I've been involved in have just not brought most of them to daylight.
Purely out of interest...if you have found memory leaks in the shop it would be interesting to hear where you found them.
Cheers
Kalle