Article Source: TSINGHUA
Sender: Forest (light cold building ~ VL), letter area: UNIX Title: Sign in the core parameters of SCO UNIX system 2 [Reserved] Send Station: BBS Shuimu Tsinghua Station (Fri Oct 29 09:11:51 1999) Prfmax is a core profile (/ dev / PRF, which is described in Profile (ADM)) The maximum number of text symbols that can be processed correctly. NCLIST specifies how many display buffers to be assigned. Each buffer contains up to 64 bytes These buffers are dynamically connected to the input / output queue of the terminal line or other low speed device. The number of the average buffers required for each terminal is 5 to 10. Each entry (buffer space plus header) contains 72 Bytes. After all, the input / output character with the terminal will be lost, although the display is still continuing. Nemap specifies the maximum number of I / O transmission mappings. Numxt determines a bitmap display device that a sub-device is configurable (Eg, the number of BLIT or AT & T5620 terminals. Numsxt determines the number of Shell layers that a sub-device can configure, the default value is 6.NKDVTTTTY determines the number of virtual terminals (TTYS) supported by the console keyboard driver, the user is not This parameter should be modified. NcPyright defines the size of the core data structure used to print the initialization information of the console. Users should not modify this parameter. Kdbsymsize is the size of the symbol table. Value must be between 10,000 to 100000. Default is 60000 .Ninode Specifies the entry to be assigned how many i-node tables, each table entry represents a memory I node of an active file. For example, an activity file may be a current directory, an open file or a mount point. When modified This variable, the file control structure is modified. The number of entrances used depends on the number of opened files. The number of inlets is typically between 100 and 400. The value of the default value is 300.N>ode is directly with the NFILE value. (Ninode is equal to or greater than nfile) Ninode must be less than or equal to nsSinode.Ninode if it is greater than ns5inode, the system will not work. When I node table overflows, the following warning information is displayed on the system console: Warning: i-node Table overflownfile Specifies how many open file entrys to be assigned. Each entry indicates that an open port contains 12 bytes. NFile entry is directly with ninode. The same manner controls its structural operation. When the file is overflow, in the system The console will display such as warning information: NO Tice: File Table Overflow Please note: This parameter does not affect the number of open files per process (see nfiles parameters) Nofiles Specifies the maximum number of files opened by each process. The default is 60. Unless a certain application package requirement Modify NOFILES, do not hurt this 60 default settings in other cases ./bin/sh uses three file portals: standard input. Standard output and standard errors (0, 1, 2 usually STDIN, stdout.stderr reserved) This only gives each process to reduce the entry of 3 other open files. If a process needs to open the file than this number than three, the standard file must be closed. This practice is Do not advocate, be careful. If the configured NOFILE value is greater than the maximum value (100) or less than the minimum value (60), the configured value is set to the default value (60), and the NPROC designated To allocate how many miles of portals. Each miles represent a process, the replacement process is always in the first entrance, and / etc / init is in the second entrance, the number of enters the terminal The number of lines and the number of processes generated by each user, each user process is between 2 to 5 (then see MAXUP, the default is 25). If the table is filled, the Fork (s) system The call will return an error EAGAIN.NPROC between 50 and 400. The default is 100.
