Comments for Dünyada 10 çeşit insan vardır, binary bilenler ve bilmeyenler http://erturkdiriksoy.wordpress.com Just another WordPress.com weblog Sat, 12 Dec 2009 23:17:22 +0000 http://wordpress.com/ hourly 1 Comment on Parallelism Partitioning CBO issue by Okcan Yasin Saygılı http://erturkdiriksoy.wordpress.com/2008/02/22/parallelism-partitioning-cbo-issue/#comment-3303 Okcan Yasin Saygılı Sat, 12 Dec 2009 23:17:22 +0000 http://erturkdiriksoy.wordpress.com/?p=14#comment-3303 good sharing especially about partioning method thanks for that good sharing
especially about partioning method
thanks for that

]]> Comment on Optimistic or Pessimistic by erturkdiriksoy http://erturkdiriksoy.wordpress.com/2007/04/16/optimistic-or-pessimistic/#comment-3301 erturkdiriksoy Sat, 06 Sep 2008 08:54:00 +0000 http://erturkdiriksoy.wordpress.com/2007/04/16/optimistic-or-pessimistic/#comment-3301 Hi Okike Unfortunately you can not alter existing tables to have row dependencies. Indeed, it is very logical, in a datablock all rows have the same SCN which is false for some rows in that datablock. It is not nice to accept false SCN as a right SCN Hi Okike
Unfortunately you can not alter existing tables to have row dependencies. Indeed, it is very logical, in a datablock all rows have the same SCN which is false for some rows in that datablock. It is not nice to accept false SCN as a right SCN

]]> Comment on Optimistic or Pessimistic by okike http://erturkdiriksoy.wordpress.com/2007/04/16/optimistic-or-pessimistic/#comment-3300 okike Sat, 06 Sep 2008 01:30:40 +0000 http://erturkdiriksoy.wordpress.com/2007/04/16/optimistic-or-pessimistic/#comment-3300 How can I modify my current tables to have rowdependencies? I cannot drop and re-creat them. Is there any script I can use? Thanks. How can I modify my current tables to have rowdependencies? I cannot drop and re-creat them. Is there any script I can use? Thanks.

]]> Comment on Latch-Lock Bölüm I by Blog http://erturkdiriksoy.wordpress.com/2007/04/22/latch-lock-bolum-i/#comment-3297 Blog Fri, 09 May 2008 11:27:41 +0000 http://erturkdiriksoy.wordpress.com/2007/04/22/latch-lock-bolum-i/#comment-3297 Güzel.. :-) Güzel.. :-)

]]> Comment on chapter 2 – calc_mbrc.sql by H.Tonguç Yılmaz http://erturkdiriksoy.wordpress.com/2007/01/14/chapter-2-calc_mbrcsql/#comment-9 H.Tonguç Yılmaz Mon, 22 Jan 2007 12:31:54 +0000 http://erturkdiriksoy.wordpress.com/2007/01/14/chapter-2-calc_mbrcsql/#comment-9 Tested on Oracle Database 10g Enterprise Edition Release 10.2.0.2.0 below script and results are as following; http://tonguc.yilmaz.googlepages.com/calc_mbrc.sql SID ID ACT_COST OLD_COST EFF_MBRC --------------- --------- --------- --------- --------- 008CPU 8 48155 16000 2.658 008NOCPU 8 19429 16000 6.588 016CPU 16 42441 8000 3.016 016NOCPU 16 12312 8000 10.396 024CPU 24 40537 5333 3.158 024NOCPU 24 9428 5333 13.577 032CPU 32 39584 4000 3.234 032NOCPU 32 7802 4000 16.406 040CPU 40 39013 3200 3.281 040NOCPU 40 6737 3200 19 048CPU 48 38632 2667 3.313 048NOCPU 48 5975 2667 21.423 056CPU 56 38360 2286 3.337 056NOCPU 56 5399 2286 23.708 064CPU 64 38155 2000 3.355 064NOCPU 64 4945 2000 25.885 16 rows selected. Tested on Oracle Database 10g Enterprise Edition Release 10.2.0.2.0 below script and results are as following;

http://tonguc.yilmaz.googlepages.com/calc_mbrc.sql

SID ID ACT_COST OLD_COST EFF_MBRC
————— ——— ——— ——— ———
008CPU 8 48155 16000 2.658
008NOCPU 8 19429 16000 6.588
016CPU 16 42441 8000 3.016
016NOCPU 16 12312 8000 10.396
024CPU 24 40537 5333 3.158
024NOCPU 24 9428 5333 13.577
032CPU 32 39584 4000 3.234
032NOCPU 32 7802 4000 16.406
040CPU 40 39013 3200 3.281
040NOCPU 40 6737 3200 19
048CPU 48 38632 2667 3.313
048NOCPU 48 5975 2667 21.423
056CPU 56 38360 2286 3.337
056NOCPU 56 5399 2286 23.708
064CPU 64 38155 2000 3.355
064NOCPU 64 4945 2000 25.885

16 rows selected.

]]> Comment on Pragma pack over structures. by emreknlk http://erturkdiriksoy.wordpress.com/2007/01/15/pragma-pack-over-structures/#comment-8 emreknlk Tue, 16 Jan 2007 15:25:17 +0000 http://erturkdiriksoy.wordpress.com/2007/01/15/pragma-pack-over-structures/#comment-8 Thank yor Erturk, i suppose it is worth to mention here that, in the below code if you comment out the first commentOut variable the struct size doesn't change! because 2 char can be stored in sequantially 2byte alignment. So the struct size is still 14byte. But if you comment out the second variable the struct size will be 16 byte! Because the second char goes after the integer which is placed in a 2*N bytes unit. So in the first situation we add an extra element and we lose no memory! On the other hand 2nd situation causes to extra 2bytes for 1 extra variable. It is very important the order and number of variables in struct. It should be well designed ;) #include #pragma pack(2) struct manken_s_p { char ch; // char commentOut; int integer; // char commentOut; double db; }; #pragma pack() int main() { std::cout Thank yor Erturk, i suppose it is worth to mention here that, in the below code if you comment out the first commentOut variable the struct size doesn’t change! because 2 char can be stored in sequantially 2byte alignment. So the struct size is still 14byte.
But if you comment out the second variable the struct size will be 16 byte! Because the second char goes after the integer which is placed in a 2*N bytes unit. So in the first situation we add an extra element and we lose no memory! On the other hand 2nd situation causes to extra 2bytes for 1 extra variable. It is very important the order and number of variables in struct. It should be well designed ;)

#include

#pragma pack(2)
struct manken_s_p {
char ch;
// char commentOut;
int integer;
// char commentOut;
double db;
};

#pragma pack()

int main()

{
std::cout

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