semaphore arrays

Test library execution startup prompt (11.2.0.1):error in Query ORA-27154 : Error: ora-27154text: post/wait Create failed----------------------------------------------------------- ----------------Cause: internal Error, multiple

The so-called semaphore is actually a number. The kernel assigns a certain meaning to this number, making it different in meaning when it equals a different value. This allows you to use it to indicate whether a resource is being used. The

When multiple process tables access a resource on the system simultaneously, such as writing a record of a database at the same time, or modifying a file at the same time, it is necessary to consider the synchronization problem in the city to ensure

When multiple process tables access a resource on the system at the same time, such as writing a record of a database at the same time, or altering a file at the same time, you need to consider the synchronization problem in the city to ensure that

Current system semaphore limit:# Ipcs-ls--semaphore limits--–Max number of arrays = 128Max semaphores per array = 250Max semaphores system wide = 32000Max Ops per semop call = 100Semmsl Meaning: The maximum number of semaphores in each

Source:Inter-process communication for Linux-semaphoresInter-process communication for Linux-semaphores版权声明：本文章内容在非商业使用前提下可无需授权任意转载、发布。转载、发布请务必注明作者和其微博、公众号地址，以便读者询问问题和甄误反馈，共同进步。微博ID：orroz公众号：Linux系统技术ObjectiveSemaphores are also called semaphores,

Semaphore signal Semaphore, and other process communication mode is very different, the main purpose is to protect critical resources. The process can determine whether certain shared resources can be accessed based on it. In addition to access

1) System V shared memoryUse IPCS to debug the shared memory test source program as follows: # Include # Include # Include # Include # Include # Include # Include Void error_out (const char * MSG) { Perror (MSG ); Exit (exit_failure ); } Int

0, some transplant, system-relatedOs_cfg_app. H /*---------------------Miscellaneous------------------*/#d Efine os_cfg_msg_pool_size 100u/* Message pool Size */#define OS_CF G_isr_stk_size 1

I. signal VolumeBefore we talk about semaphores, we should mention the concept of critical resources and critical zones , which refers to multiple process accesses but only one process exclusive resource for a period of time, while a critical