$query =
"select   sum(decode(NAME, 'consistent gets',VALUE, 0)),
         sum(decode(NAME, 'db block gets',VALUE, 0)),
         sum(decode(NAME, 'physical reads',VALUE, 0)),
         round((sum(decode(name, 'consistent gets',value, 0)) + 
            sum(decode(name, 'db block gets',value, 0)) - 
            sum(decode(name, 'physical reads',value, 0))) / 
         (sum(decode(name, 'consistent gets',value, 0)) + 
         sum(decode(name, 'db block gets',value, 0))) * 100,2) ".'from     sys.v_$sysstat';

$stmt = OCIParse($conn,$query);
OCIExecute($stmt);
$nrows = OCIFetchStatement($stmt,$results);

=======bt==========

Program received signal SIGSEGV, Segmentation fault.
0x40272fc8 in php_if_ocifetchstatement (ht=1162094669, return_value=0x45444f43, this_ptr=0x4d414e28, return_value_used=1126640709)
    at oci8.c:3492
3492$$RETURN_LONG(rows);
(gdb) bt
#0  0x40272fc8 in php_if_ocifetchstatement (ht=1162094669, return_value=0x45444f43, this_ptr=0x4d414e28, 
    return_value_used=1126640709) at oci8.c:3492
#1  0x5553282f in ?? ()
Cannot access memory at address 0x29292930.