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    Subjectquestion about kernel limits
    hello. because i'm going to run lotus domino with large number of
    concurrent users on linux, the kernel limits(of open file,processes,
    inodes for the whole system,a single user and a process)is a key factor
    to the performance. currently,the number of users cannot exceed 500 on 2.4.3.
    i change the value of /proc/sys/fs/file-max and open files in ulimit
    but it doesn't work. besides, what are the meaning of NR_OPEN,NR_FILE,
    file-max,and OPEN_MAX. which do they effect on respectively, system, a
    user, or a process. in limits.h,NR_OPEN is set to 1024,but in fs.h it is
    defined as 1024*1024. what do they mean? in addition, i cannot find
    inode-max under /proc/sys/fs, is it due to the change of the mechanism
    of its allocation. what's the change? and last question, what are the
    actual values of these limits, is there any way to increase the supported
    number of users? it will be very kind of you if you can introduce me
    some materials on linux kernel, especially on process management(pthread,
    fork,clone and so on).


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