What is Cache

[Former Member]

Hello all,

What is Cache and how many types of Caches are there in XI and what are their purposes.

Regards

[Former Member]

Hi

Cache in general is to speedup the execution at runtime ie., by storing updated information in between rather than fetching all the way from server again to avoid i/o access to databases. As you know, database i/o is time consuming and in general should be avaoided unless warranted or any data change has occurred.

Cache in XI - every component in XI ie., IR, ID, AF (Adapter framework), IE (Int. Engine) all has its own cache and primarily works hand-in-hand with Integration Builder to co-ordinate the cache refreshing. SXI_CACHE transaction holds all the configuration objects status, any changes to configuration objects, cache gets refreshed or delta refreshed.

For instance TC - SXI_CACHE will show all details with what is recently refreshed like Partners, Services, RD, ID, Commn. Channel etc., including the pipeline items

If you have access to an ABAP (XI) system try tcode SX_CACHE and start from there.

Hope this helps

Cheers

Senthil

[Former Member]

Thanks

Now how to use differnt types of Caches like SLD_CACHE, AdapterCache, SXI_CACHE and what are their purpose

[Former Member]

Cache refr this Pdf

if you have cache related issues:

https://websmp109.sap-ag.de/~sapdownload/011000358700003163902004E/HowTo_handle_XI_30_Caches.pdf

Thanks!

[Former Member]

Hi

Cache in XI are handled by XI by the WAS container and the Java Cache Engine and there is nothing that you manually control the cache and land into danger..

However, you may want to use SXI_CACHE tcode for mainly to refresh cache so that it can fetch the objects configuration afresh in case there is any change

Programattically there is nothing that you do except to refresh

Hope this helps

Cheers

Senthil

[Former Member]

Hi Henry,

There are 2 types of caches.....

CPA cache - is your Collaboration profile agreement cache, ie to mean it will contains the cache copy of all objects created during configuration time (ID).CPA (Collaboration profile agreement )Cache-mainly for J2EE engine/Adapter engine.

About Cache Monitoring-

http://help.sap.com/saphelp_nw2004s/helpdata/en/92/2fd93f130f9115e10000000a155106/content.htm

Runtime cache - it will contain cache copies of all the objects in XI (IR/ID)

and active version of all your objects during runtime.

Check this.......

https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/docs/library/uuid/1a69ea11-0d01-0010-fa80-b47...

Also check these threads

http://help.sap.com/saphelp_nw04/helpdata/en/6e/798e07b33b11d5993800508b6b8b11/frameset.htm

http://help.sap.com/saphelp_nw04s/helpdata/en/00/241da12ef84f40bb6ecd3ae73d8b58/frameset.htm

http://help.sap.com/saphelp_nw04s/helpdata/en/a8/22ee41c334c717e10000000a155106/frameset.htm

************Reward points if usefull***********