Signal Volume (SEM)

First, the signal volume: (Data operation Lock) control inter-process mutual exclusion, synchronization, etc., coordinate multiple programs to access a shared resource at the same time.How it works: The semaphore can only have two operation waits

Kernel.sem semaphore parameter tuning, and IPCS semaphore queue query

First introduce the next kernel.sem this parameter CAT/PROC/SYS/KERNEL/SEM250 32000 32 128 or IPCS-LS------Semaphore Limits--------max number of arrays = 128max semaphores per array = 250max semaphores system wide = 32000max Ops per semop call =

Reasonable website optimization sem work

Website optimization I: monitoring of user links and rankingsWhy is this job a top priority ?! There are two reasons: first, you can detect problematic links in time and remove them in time to avoid the possibility of being punished! The second is

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