DBMS_LOCK.SLEEP()存储过程: 作用:使用这个存储过程可以中止会话一段时间 语法:DBMS_LOCK.SLEEP(seconds IN NUMBER);单位为“秒”,最小的增量可以百分之一秒 例如:DBMS_LOCK.SLEEP(1.95);是一个合法的值 Example: (1)由于是一个存储过程可以直接使用 SQL> executedbms_lock.sleep(60); PL/SQL procedure succ...
updated every 6 seconds hence that is the minimum time that the flashback query time needs to be behind the timestamp of the first change to the table.)在版本 9.2 中 SMON_SCN_TIME 每 5 分钟被更新一次(In Oracle Database 9.2, smon_scn_time isupdated every 5 minutes hence the required ...
Exec("begin DBMS_LOCK.sleep(7); end;") // check for errorscomplete example found in examples/crudinput parameters parameters in oracle should start with : for example :pr1 passing input parameters as defined by database/sql package.parameter type int64 / float64 and their equivalent string ...
Thread.sleep(100); latch.countDown(); pool.awaitTermination(5, TimeUnit.SECONDS); } } 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15. 16. 17. 18. 19. 20. 21. 22. 23. 24. 25. 26. 27. 28. 29. 30. 31. 32. 33. 34. 35. 36. 37. 38. 39. 40. 41...
[PHILOS]; 27 pthread_mutex_t food_lock; 28 int sleep_seconds = 0; 29 30 31 int 32 main (int argn, 33 char **argv) 34 { 35 int i; 36 37 if (argn == 2) 38 sleep_seconds = atoi (argv[1]); 39 40 pthread_mutex_init (&food_lock, NULL); 41 for (i = 0; i < PHILOS...
31 int sleep_seconds = 0; 32 uint32_t num_can_eat = PHILOS - 1; 33 34 35 int 36 main (int argn, 37 char **argv) 38 { 39 int i; 40 41 pthread_mutex_init (&food_lock, NULL); 42 pthread_mutex_init (&num_can_eat_lock, NULL); ...
Polling模式下,待commit的进程,通知lgwr进程进行写入操作后,会进入sleep环节,并在timeout后去看是否log buffer中的内容被写入了磁盘,lgwr进程不再单独通知待commit的进程写已经完成。Polling机制下,解放了一部分lgwr的工作,但是会带来待commit的进程长时间处于log file sync等待下。对于交易型的系统而言,该机制是极度不...
DBMS_LOCK.SLEEP(60); SELECT SUM(value) INTO val2 FROM gv$sysstat WHERE name IN ('user commits','transaction rollbacks'); diff := val2-val1; average := average + diff; DBMS_OUTPUT.PUT_LINE(diff); END LOOP; DBMS_OUTPUT.PUT_LINE('Average = ' || average/runs); ...
sleep(float8) allocate_unique(text,text,int4) request(int8,int4,int4,bool) request(text,int4,int4,bool) release(int8) release(text) dbms_application_info read_client_info(text) read_module(text,text) set_client_info(text) set_module(text,text) dbms_obfuscation_toolkit md5(text) dbms...
这些负责IO fencing的进程一般都会被锁定在内存中(locked in memory)、实时运行(Real time)、休眠固定的时间(Sleep a fixed time)、以root身份运行;若进程唤醒后发现时间已经太晚,那么它会强制reboot;若这些进程发生失败,则也会重启,所以在RAC环境中oprocd是一个很重要的进程,不要失去手动去kill这个进程。