comments of FreeBSD(5.0) sysctls

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kern.maxfilesperproc Maximum files allowed open per process kern.maxfiles Maximum number of files kern.openfiles System-wide number of open files kern.kq_calloutmax Maximum number of callouts allocated for kqueue kern.lastpid Last used PID security_jail.set_hostname_allowed Processes in jail can set their hostnames security_jail.socket_unixiproute_only Processes in jail are limited to creating UNIX/IPv4/route sockets only security_jail.sysvipc_allowed Processes in jail can use System V IPC primitives debug_ktr.alq_max Maximum number of entries to write debug_ktr.alq_cnt Current number of written entries debug_ktr.alq_failed Number of times we overran the buffer debug_ktr.alq_depth Number of items in the write buffer security_mac.enforce_fs Enforce MAC policy on file system objects security_mac.enforce_network Enforce MAC policy on network packets security_mac.enforce_pipe Enforce MAC policy on pipe operations security_mac.enforce_process Enforce MAC policy on inter-process operations security_mac.enforce_socket Enforce MAC policy on socket operations security_mac.enforce_vm Enforce MAC policy on vm operations security_mac.label_size Pre-compiled MAC label size security_mac.cache_fslabel_in_vnode Cache mount fslabel in vnode security_mac.vnode_label_cache_hits Cache hits on vnode labels security_mac.vnode_label_cache_misses Cache misses on vnode labels security_mac.mmap_revocation Revoke mmap access to files on subject security_mac.mmap_revocation_via_cow Revoke mmap access to files via security_mac_debug.label_fallback Filesystems should fall back to fs label kern.osrevision Operating system revision kern.osreldate Operating system release date kern.maxproc Maximum number of processes kern.maxprocperuid Maximum processes allowed per userid kern.maxusers Hint for kernel tuning kern.argmax Maximum bytes of argument to execve(2) kern.posix1version Version of POSIX attempting to comply to kern.ngroups Maximum number of groups a user can belong to kern.job_control Whether job control is available kern.saved_ids Whether saved set-group/user ID is available kern.saved_ids Whether saved set-group/user ID is available hw.ncpu Number of active CPUs hw.ncpu Number of active CPUs hw.byteorder System byte order hw.pagesize System memory page size regression.securelevel_nonmonotonic securelevel may be lowered user.bc_base_max Max ibase/obase values in bc(1) user.bc_dim_max Max array size in bc(1) user.bc_scale_max Max scale value in bc(1) user.bc_string_max Max string length in bc(1) user.coll_weights_max Maximum number of weights assigned to an LC_COLLATE locale entry user.line_max Max length (bytes) of a text-processing utility's input line user.re_dup_max Maximum number of repeats of a regexp permitted user.posix2_version The version of POSIX 1003.2 with which the system attempts to comply user.posix2_c_bind Whether C development supports the C bindings option user.posix2_c_dev Whether system supports the C development utilities option user.posix2_char_term user.posix2_fort_dev Whether system supports FORTRAN development utilities user.posix2_fort_run Whether system supports FORTRAN runtime utilities user.posix2_localedef Whether system supports creation of locales user.posix2_sw_dev Whether system supports software development utilities user.posix2_upe Whether system supports the user portability utilities user.stream_max Min Maximum number of streams a process may have open at one time user.tzname_max Min Maximum number of types supported for timezone names debug_sizeof.vnode sizeof(struct vnode) debug_sizeof.proc sizeof(struct proc) debug_sizeof.cdev sizeof(struct cdev) debug_sizeof.bio sizeof(struct bio) debug_sizeof.buf sizeof(struct buf) debug_sizeof.kinfo_proc sizeof(struct kinfo_proc) debug_mutex_prof.enable Enable tracing of mutex holdtime debug_mutex_prof.acquisitions Number of mutex acquistions recorded debug_mutex_prof.records Number of profiling records debug_mutex_prof.maxrecords Maximum number of profiling records debug_mutex_prof.rejected Number of rejected profiling records debug_mutex_prof.hashsize Hash size debug_mutex_prof.collisions Number of hash collisions security_bsd.suser_enabled processes with uid 0 have privilege security_bsd.see_other_uids Unprivileged processes may see subjects/objects with different real uid security_bsd.unprivileged_proc_debug Unprivileged processes may use process debugging facilities kern.logsigexit Log processes quitting on abnormal signals to syslog(3) kern.sugid_coredump Enable coredumping set user/group ID processes kern.iov_max Maximum number of elements in an I/O vector; sysconf(_SC_IOV_MAX) kern_timecounter.tick debug.bus_debug Debug bus code kern_devstat.numdevs Number of devices in the devstat list kern_devstat.version Devstat list version number debug_sizeof.disklabel sizeof(struct disklabel) debug_sizeof.diskslices sizeof(struct diskslices) debug_sizeof.disk sizeof(struct disk) kern_ipc.nmbclusters Maximum number of mbuf clusters available kern_ipc.nmbufs Maximum number of mbufs available kern_ipc.nmbcnt Number used to scale kmem_map to ensure sufficient space for counters kern_ipc.nsfbufs Maximum number of sendfile(2) sf_bufs available kern_ipc.mbuf_wait Sleep time of mbuf subsystem wait allocations during exhaustion kern.log_console_output security_bsd.unprivileged_read_msgbuf Unprivileged processes may read the kernel message buffer debug.rman_debug rman debug kern_ipc.somaxconn Maximum pending socket connection queue size kern_ipc.numopensockets Number of open sockets kern_ipc_zero_copy.receive Enable zero copy receive kern_ipc_zero_copy.send Enable zero copy send kern_ipc.maxsockets Maximum number of sockets avaliable vfs_aio.num_queue_count Number of queued aio requests vfs_aio.num_buf_aio Number of aio requests presently handled by the buf subsystem vfs_aio.aiod_timeout Timeout value for synchronous aio operations vfs_aio.aiod_lifetime Maximum lifetime for idle aiod vfs_aio.unloadable Allow unload of aio (not recommended) vfs_aio.max_aio_per_proc Maximum active aio requests per process (stored in the process) vfs_aio.max_aio_queue_per_proc Maximum queued aio requests per process (stored in the process) vfs_aio.max_buf_aio Maximum buf aio requests per process (stored in the process) vfs.vmiodirenable Use the VM system for directory writes vfs.runningbufspace Amount of presently outstanding async buffer io vfs.bufspace KVA memory used for bufs vfs.maxbufspace Maximum allowed value of bufspace (including buf_daemon) vfs.bufmallocspace Amount of malloced memory for buffers vfs.maxmallocbufspace Maximum amount of malloced memory for buffers vfs.lobufspace Minimum amount of buffers we want to have vfs.hibufspace Maximum allowed value of bufspace (excluding buf_daemon) vfs.bufreusecnt Number of times we have reused a buffer vfs.buffreekvacnt Number of times we have freed the KVA space from some buffer vfs.bufdefragcnt Number of times we have had to repeat buffer allocation to defragment vfs.lorunningspace Minimum preferred space used for in-progress I/O vfs.hirunningspace Maximum amount of space to use for in-progress I/O vfs.numdirtybuffers Number of buffers that are dirty (has unwritten changes) at the moment vfs.lodirtybuffers How many buffers we want to have free before bufdaemon can sleep vfs.hidirtybuffers When the number of dirty buffers is considered severe vfs.numfreebuffers Number of free buffers vfs.lofreebuffers XXX Unused vfs.hifreebuffers XXX Complicatedly unused vfs.getnewbufcalls Number of calls to getnewbuf vfs.getnewbufrestarts Number of times getnewbuf has had to restart a buffer aquisition debug.dobkgrdwrite Do background writes (honoring the BX_BKGRDWRITE flag)? debug.disablecwd Disable the getcwd syscall debug.rcluster Debug VFS clustering code kern.maxvnodes Maximum number of vnodes kern.minvnodes Minimum number of vnodes debug.vnlru_nowhere Number of times the vnlru process ran without success -- ※ 發信站: 批踢踢實業坊(ptt.csie.ntu.edu.tw) ◆ From: 140.112.30.143