numfree          3377 ext/oci8/oci8.c 		ub4 numfree = 0, numbusy = 0, numopen = 0;
numfree          3380 ext/oci8/oci8.c 		numfree = numopen - numbusy;	/* number of free connections in the pool */
numfree          3381 ext/oci8/oci8.c 		DTRACE_OCI8_SESSPOOL_STATS(numfree, numbusy, numopen);