Clarifications on 860 cancellation

Question

Hello All,
           I need to cancel a PO using EDI 860, can anyone help me out with their tots of how to go abt it and how do we cancel one single line item if we have multiple line items, all your help is highly appreciated and for sure will be rewarded,take good care.

Answer 1

1.When SGA is allocated and oracle started will it occupy the entire size of SGA?The SGA is allocated when an instance starts and deallocated when the instance shuts down. Each instance that is started has its own SGA.
Oracle Database can set limits on how much virtual memory the database uses for the SGA. It can start instances with minimal memory and allow the instance to use more memory by expanding the memory allocated for SGA components, up to a maximum determined by the SGA_MAX_SIZE initialization parameter.
2.Is there some tool or query to identify the actual consumption of SGA? If so pl helpselect round(used.bytes /1024/1024 ,2) used_mb
,round(free.bytes /1024/1024 ,2) free_mb
,round(tot.bytes /1024/1024 ,2) total_mb
from (select sum(bytes) bytes
from v$sgastat
where name != 'free memory') used
,(select sum(bytes) bytes
from v$sgastat
where name = 'free memory') free
,(select sum(bytes) bytes
from v$sgastat) tot
v$SGA* views have current usages of SGA i.e. v$sga, v$sgastat,V$sga_dynamic_components,v$sgainfo, v$sga_current_resize_ops etc.
Regards
Girish Sharma