Re: direct read is much faster than scattered read, is it reasonable?

From: <zhuchao_at_gmail.com>
Date: Wed, 28 May 2008 12:39:42 +0000
Message-ID: 1877704171-1211978481-cardhu_decombobulator_blackberry.rim.net-1329966950-@bxe138.bisx.prod.on.blackberry>


R29vZCBxdWVzdGlvbi4NCk1vc3QgbGlrZWx5LCBkaXJlY3QgcGF0aCByZWFkIGlzIGFzeW5jIHJl YWQsIHdoaWxlIGFsbCBvdGhlciBhcmUgc3luYyByZWFkLiBTbyByaWdodCBhZnRlciBvcmFjbGUg aXNzdWUgdGhlIHJlYWQgcmVxdWVzdCwgaXQgaXMgYWJsZSB0byBkbyBzb21ldGhpbmcgZWxzZS4N ClRydXNzIC1wICRwaWQgc2hvdWxkIHNlZSBrYWlvIGZvciBkaXJlY3QgcGF0aCByZWFkLCBhbmQg cHJlYWQgZm9yIGRiIGZpbGUgeHh4IHJlYWQuDQpKdXN0IG15IGd1ZXNzIHRob3VnaA0KU2VudCB2 aWEgQmxhY2tCZXJyeSBieSBBVCZUDQoNCi0tLS0tT3JpZ2luYWwgTWVzc2FnZS0tLS0tDQpGcm9t OiAicWlodWEgd3UiIDxzdGF5d2l0aHBpbkBnbWFpbC5jb20+DQoNCkRhdGU6IFdlZCwgMjggTWF5 IDIwMDggMTc6NDU6NTkgDQpUbzpvcmFjbGUtbCA8b3JhY2xlLWxAZnJlZWxpc3RzLm9yZz4NClN1 YmplY3Q6IGRpcmVjdCByZWFkIGlzIG11Y2ggZmFzdGVyIHRoYW4gc2NhdHRlcmVkIHJlYWQsIGlz IGl0IHJlYXNvbmFibGU/DQoNCg0KSSBleGVjdXRlZCB0aGVzZSBzcWwgb24gbXkgZGF0YWJhc2U6 CgpTUUw+oCBzZWxlY3QgdGltZV93YWl0ZWRfbWljcm8vdG90YWxfd2FpdHMvMTAwMDAwMCBmcm9t IHYkc3lzdGVtX2V2ZW50oCB3aGVyZSBldmVudF9pZCBpbiAoc2VsZWN0IGV2ZW50X2lkIGZyb20g diRldmVudF9uYW1lIHdoZXJlIG5hbWU9J2RpcmVjdCBwYXRoIHJlYWQnKTsKClRJTUVfV0FJVEVE X01JQ1JPL1RPVEFMX1dBSVRTLzEwMDAwMDAKIC0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0t LS0tLS0tLS0KoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKAgLjAwMDUwMzM0MgoKU1FMPiBzZWxl Y3QgdGltZV93YWl0ZWRfbWljcm8vdG90YWxfd2FpdHMvMTAwMDAwMCBmcm9tIHYkc3lzdGVtX2V2 ZW50oCB3aGVyZSBldmVudF9pZCBpbiAoc2VsZWN0IGV2ZW50X2lkIGZyb20gdiRldmVudF9uYW1l IHdoZXJlIG5hbWU9J2RiIGZpbGUgc2NhdHRlcmVkIHJlYWQnKTsKIApUSU1FX1dBSVRFRF9NSUNS Ty9UT1RBTF9XQUlUUy8xMDAwMDAwCi0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0tLS0t LS0KoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKCgoKAgLjAwMTgxODgwMwoKCgpXZSBjb3VsZCBzZWU6 oCB0byBhY2Nlc3Mgb25lIGJsb2NrIHVzaW5nIHNjYXR0ZXJlcmQgcmVhZCygIGl0IHdpbGwgdGFr ZSAxLjggbXMsoCBidXQgd2hlbiBhY2Nlc3Mgb25lIGJsb2NrIHVzaW5nICJkaXJlY3QgcGF0aCBy ZWFkIiwgaXQgb25seSB0YWtlcyAwLjVtcy6gIEhvdyBjb3VsZCBkaXJlY3QgcGF0aCByZWFkIG11 Y2ggbXVjaCBxdWlja2VyIHRoYW4gc2NhdHRlcmVyIHJlYWQ/IElzbid0IHRoZSBzY2F0dGVyZWQg cmVhZCB0aGUgZmFzdGVzdCBtZXRob2QgdG8gYWNjZXNzIGRhdGEgYmxvY2s/oCBPdXIgc3lzdGVt IHVzZXMgU0FOIHN0b3JhZ2UsIGFuZCBTQU4gY291bGQgcHJlLWZldGNoIHRvIHNwZWVkLXVwIHRo ZSBibG9jayBhY2Nlc3MuIEJ1dCBJIHRoaW5rIGl0IHByZS1mZXRjaCB3aWxsIGhlbHAgYm90aCBz Y2F0dGVyZWQgcmVhZCBhbmQgZGlyZWN0IHBhdGggcmVhZCwgYW0gSSByaWdodD8KIApUaGFua3Ms ClFpaHVhCiA=

--
http://www.freelists.org/webpage/oracle-l
Received on Wed May 28 2008 - 07:39:42 CDT

Original text of this message