Contents of OnLine Shared Memory and IDS Resident Shared Memory
The engines differ in the way they refer to these similar sections of shared memory. This section is the complete shared memory of the OnLine systems and the resident portion of the IDS shared memory. With the exception of more structures in IDS, they are similar enough to discuss at the same time. Informix uses its shared memory to store system information as well as to buffer actual pages from the database. This system information keeps track of system resources and their availability to the user.
This data is stored in arrays and other data structures within shared memory. These data structures are created and sized at the time the shared memory is initialized. The parameters ...
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