_EDC_STOR_INCREMENT

Sets the size of increments to the internal library storage subpool acquired above the 16M line. By default, when the storage subpool is filled, its size is incremented by 8K. When _EDC_STOR_INCREMENT is set, its value string is translated to its decimal integer equivalent. This integer is then the new setting of the subpool storage increment size. The setting of this environment variable is only effective if it is done before the first I/O in the enclave.

The _EDC_STOR_INCREMENT value must be greater than zero, and must be a multiple of 4K. If the value is less than zero, the default setting of 8K is used. If the value is not a multiple of 4K, then it is rounded up to the next 4K interval. If _EDC_STOR_INCREMENT is set to an invalid value that must be modified internally to be divisible by 4K, this modification is not reflected in the character string that appears in the environment variable table.

Consider the case where setenv() is called as follows:

   setenv("_EDC_STOR_INCREMENT","9000",1);

Internally, the storage subpool increment value is set to 12288 (that is, 12K). However, the following subsequent call returns "9000", as set by the call to setenv().

   getenv("_EDC_STOR_INCREMENT");

Note: _EDC_STOR_INCREMENT is not supported in AMODE 64. In AMODE 64 this environment variable is replaced by the IOHEAP64 runtime option.