From owner-freebsd-hackers  Tue Feb 20 10:25: 5 2001
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Date: Tue, 20 Feb 2001 19:24:22 +0100
To: Len Conrad <LConrad@Go2France.com>, freebsd-hackers@freebsd.org
From: mouss <usebsd@free.fr>
Subject: Re: postfix: No buffer space available
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You might want to try setting
         net.inet.tcp.sendspace
         net.inet.tcp.recvspace
to larger values. I have these in my /etc/sysctl.conf.

regards,
mouss

At 15:28 20/02/01 +0100, Len Conrad wrote:
>Sorry to bother you hackers again, but two submissions to -questions got 
>no response so it looks like another scaleability issue on you people can 
>handle :
>
>================
>
>On a very busy postfix relay hub, we're seeing this:
>
>Feb 19 15:00:16 imgate2 postfix/smtpd[323]: fatal: socket: No buffer
>space available
>
>Feb 19 15:00:17 imgate2 postfix/smtp[684]: fatal: socket: No buffer
>space available
>
>Can we fix this with a systcl write?
>
>The server already has:
>
># sysctl -a | grep maxfile
>kern.maxfiles: 16384
>kern.maxfilesperproc: 16384
>
>... which fixed "fatal: too many files open" pb for this client last November.
>
>btw, Wietse Venema himself asked me to be informed of how I manage to 
>tweak FreeBSD to handle this apparent scaleability issue.
>
>"sysctl -a"
>
>gives:
>
>kern.ostype: FreeBSD
>kern.osrelease: 4.1.1-RELEASE
>kern.osrevision: 199506
>kern.version: FreeBSD 4.1.1-RELEASE #0: Tue Sep 26 00:46:59 GMT 2000
>     jkh@narf.osd.bsdi.com:/usr/src/sys/compile/GENERIC
>
>kern.maxvnodes: 32525
>kern.maxproc: 532
>kern.maxfiles: 16384
>kern.argmax: 65536
>kern.securelevel: -1
>kern.hostname: imgate2.snip.net
>kern.hostid: 0
>kern.clockrate: { hz = 100, tick = 10000, tickadj = 5, profhz = 1024, 
>stathz = 128 }
>kern.posix1version: 199309
>kern.ngroups: 16
>kern.job_control: 1
>kern.saved_ids: 0
>kern.boottime: { sec = 982608649, usec = 136401 } Mon Feb 19 13:50:49 2001
>kern.domainname:
>kern.osreldate: 411000
>kern.bootfile: /kernel
>kern.maxfilesperproc: 16384
>kern.maxprocperuid: 531
>kern.dumpdev:
>kern.ipc.maxsockbuf: 262144
>kern.ipc.sockbuf_waste_factor: 8
>kern.ipc.somaxconn: 128
>kern.ipc.max_linkhdr: 16
>kern.ipc.max_protohdr: 60
>kern.ipc.max_hdr: 76
>kern.ipc.max_datalen: 136
>kern.ipc.nmbclusters: 1024
>kern.ipc.semmap: 30
>kern.ipc.semmni: 10
>kern.ipc.semmns: 60
>kern.ipc.semmnu: 30
>kern.ipc.semmsl: 60
>kern.ipc.semopm: 100
>kern.ipc.semume: 10
>kern.ipc.semusz: 92
>kern.ipc.semvmx: 32767
>kern.ipc.semaem: 16384
>kern.ipc.shmmax: 4194304
>kern.ipc.shmmin: 1
>kern.ipc.shmmni: 96
>kern.ipc.shmseg: 64
>kern.ipc.shmall: 1024
>kern.ipc.shm_use_phys: 0
>kern.ipc.mbuf_wait: 32
>kern.ipc.mbtypes: 460 164 160 0 0 0 0 0 0 0 0 0 0 0 0 0
>kern.ipc.nmbufs: 4096
>kern.ipc.maxsockets: 1064
>kern.dummy: 0
>kern.ps_strings: 3217031152
>kern.usrstack: 3217031168
>kern.logsigexit: 1
>kern.cam.cd.changer.min_busy_seconds: 5
>kern.cam.cd.changer.max_busy_seconds: 15
>kern.fallback_elf_brand: 9
>kern.init_path: /sbin/init:/sbin/oinit:/sbin/init.bak:/stand/sysinstall
>kern.module_path: /;/boot/;/modules/
>kern.acct_suspend: 2
>kern.acct_resume: 4
>kern.acct_chkfreq: 15
>kern.timecounter.method: 0
>kern.timecounter.hardware: i8254
>kern.ps_arg_cache_limit: 256
>kern.ps_argsopen: 1
>kern.fast_vfork: 1
>kern.randompid: 0
>kern.ps_showallprocs: 1
>kern.shutdown.poweroff_delay: 5000
>kern.shutdown.kproc_shutdown_wait: 60
>kern.sugid_coredump: 0
>kern.coredump: 1
>kern.corefile: %N.core
>kern.quantum: 100000
>kern.ccpu: 1948
>kern.fscale: 2048
>kern.devstat.numdevs: 7
>kern.devstat.generation: 7
>kern.devstat.version: 4
>kern.nselcoll: 60034
>kern.consmute: 0
>kern.filedelay: 30
>kern.dirdelay: 29
>kern.metadelay: 28
>kern.chroot_allow_open_directories: 1
>vm.loadavg: { 0.39 0.43 0.52 }
>vm.v_free_min: 886
>vm.v_free_target: 2906
>vm.v_free_reserved: 248
>vm.v_inactive_target: 4359
>vm.v_cache_min: 2906
>vm.v_cache_max: 5812
>vm.v_pageout_free_min: 34
>vm.pageout_algorithm: 0
>vm.swap_enabled: 1
>vm.swap_async_max: 4
>vm.swap_idle_threshold1: 2
>vm.swap_idle_threshold2: 10
>vm.v_free_severe: 567
>vm.stats.sys.v_swtch: 15651300
>vm.stats.sys.v_trap: 1045137
>vm.stats.sys.v_syscall: 53830549
>vm.stats.sys.v_intr: 19460810
>vm.stats.sys.v_soft: 3519936
>vm.stats.vm.v_vm_faults: 610808
>vm.stats.vm.v_cow_faults: 138115
>vm.stats.vm.v_cow_optim: 0
>vm.stats.vm.v_zfod: 310288
>vm.stats.vm.v_ozfod: 309994
>vm.stats.vm.v_swapin: 0
>vm.stats.vm.v_swapout: 0
>vm.stats.vm.v_swappgsin: 0
>vm.stats.vm.v_swappgsout: 0
>vm.stats.vm.v_vnodein: 374
>vm.stats.vm.v_vnodeout: 0
>vm.stats.vm.v_vnodepgsin: 2490
>vm.stats.vm.v_vnodepgsout: 0
>vm.stats.vm.v_intrans: 2
>vm.stats.vm.v_reactivated: 125
>vm.stats.vm.v_pdwakeups: 0
>vm.stats.vm.v_pdpages: 0
>vm.stats.vm.v_dfree: 0
>vm.stats.vm.v_pfree: 355480
>vm.stats.vm.v_tfree: 809980
>vm.stats.vm.v_page_size: 4096
>vm.stats.vm.v_page_count: 127974
>vm.stats.vm.v_free_reserved: 248
>vm.stats.vm.v_free_target: 2906
>vm.stats.vm.v_free_min: 886
>vm.stats.vm.v_free_count: 97173
>vm.stats.vm.v_wire_count: 8879
>vm.stats.vm.v_active_count: 11659
>vm.stats.vm.v_inactive_target: 4359
>vm.stats.vm.v_inactive_count: 10259
>vm.stats.vm.v_cache_count: 4
>vm.stats.vm.v_cache_min: 2906
>vm.stats.vm.v_cache_max: 5812
>vm.stats.vm.v_pageout_free_min: 34
>vm.stats.vm.v_interrupt_free_min: 2
>vm.stats.misc.zero_page_count: 70388
>vm.stats.misc.cnt_prezero: 376460
>vm.max_proc_mmap: 36401
>vm.pageout_stats_max: 2906
>vm.pageout_full_stats_interval: 20
>vm.pageout_stats_interval: 5
>vm.pageout_stats_free_max: 5
>vm.swap_idle_enabled: 0
>vm.defer_swapspace_pageouts: 0
>vm.disable_swapspace_pageouts: 0
>vm.max_page_launder: 32
>vm.zone:
>ITEM            SIZE     LIMIT    USED    FREE  REQUESTS
>
>PIPE:            160,        0,     36,     66,     1232
>SWAPMETA:        160,   255948,      0,      0,        0
>tcpcb:           544,     1064,    135,    173,   116705
>unpcb:            64,        0,    406,    490,   334655
>ripcb:           192,     1064,      0,     42,        2
>tcpcb:           544,     1064,      0,      0,        0
>udpcb:           192,     1064,     15,     69,   518065
>socket:          192,     1064,    556,    494,   969428
>KNOTE:            64,        0,     13,    115,   515373
>NFSNODE:         320,        0,      0,      0,        0
>NFSMOUNT:        544,        0,      0,      0,        0
>VNODE:           192,        0,   3547,     57,     3547
>NAMEI:          1024,        0,      0,     32,  2582839
>VMSPACE:         192,        0,    158,    226,     6604
>PROC:            416,        0,    162,    181,     6612
>DP fakepg:        64,        0,      0,      0,        0
>PV ENTRY:         28,   368522,  37542,  93519,  2439070
>MAP ENTRY:        48,        0,   1935,   2018,   198503
>KMAP ENTRY:       48,    32121,    800,     93,     2352
>MAP:             108,        0,      7,      3,        7
>VM OBJECT:        96,        0,   3017,   1145,   198323
>vm.zone_kmem_pages: 109
>vm.zone_kmem_kvaspace: 50917376
>vm.zone_kern_pages: 389
>vfs.nfs.nfs_privport: 0
>vfs.nfs.async: 0
>vfs.nfs.commit_blks: 0
>vfs.nfs.commit_miss: 0
>vfs.nfs.realign_test: 0
>vfs.nfs.realign_count: 0
>vfs.nfs.bufpackets: 4
>vfs.nfs.gatherdelay: 10000
>vfs.nfs.gatherdelay_v3: 0
>vfs.nfs.defect: 0
>vfs.nfs.diskless_valid: 0
>vfs.nfs.diskless_rootpath:
>vfs.nfs.diskless_swappath:
>vfs.nfs.access_cache_timeout: 60
>vfs.nfs.nfsv3_commit_on_close: 0
>vfs.numdirtybuffers: 175
>vfs.hidirtybuffers: 999
>vfs.numfreebuffers: 3743
>vfs.lofreebuffers: 222
>vfs.hifreebuffers: 444
>vfs.runningbufspace: 0
>vfs.maxbufspace: 64192512
>vfs.hibufspace: 63537152
>vfs.lobufspace: 63471616
>vfs.bufspace: 63471616
>vfs.maxbdrun: 64
>vfs.maxmallocbufspace: 3176857
>vfs.bufmallocspace: 906240
>vfs.getnewbufcalls: 256989
>vfs.getnewbufrestarts: 0
>vfs.vmiodirenable: 0
>vfs.bufdefragcnt: 0
>vfs.buffreekvacnt: 0
>vfs.bufreusecnt: 3874
>vfs.cache.numneg: 198
>vfs.cache.numcache: 3175
>vfs.cache.numcalls: 6561612
>vfs.cache.dothits: 41443
>vfs.cache.dotdothits: 4051
>vfs.cache.numchecks: 9809415
>vfs.cache.nummiss: 435273
>vfs.cache.nummisszap: 367588
>vfs.cache.numposzaps: 168979
>vfs.cache.numposhits: 5454779
>vfs.cache.numnegzaps: 2886
>vfs.cache.numneghits: 86613
>vfs.cache.numcwdcalls: 306
>vfs.cache.numcwdfail1: 0
>vfs.cache.numcwdfail2: 0
>vfs.cache.numcwdfail3: 0
>vfs.cache.numcwdfail4: 0
>vfs.cache.numcwdfound: 306
>vfs.cache.numfullpathcalls: 0
>vfs.cache.numfullpathfail1: 0
>vfs.cache.numfullpathfail2: 0
>vfs.cache.numfullpathfail3: 0
>vfs.cache.numfullpathfail4: 0
>vfs.cache.numfullpathfound: 0
>vfs.write_behind: 1
>vfs.reassignbufcalls: 1115698
>vfs.reassignbufloops: 0
>vfs.reassignbufsortgood: 229967
>vfs.reassignbufsortbad: 327979
>vfs.reassignbufmethod: 1
>vfs.timestamp_precision: 0
>vfs.usermount: 0
>vfs.ffs.doreallocblks: 1
>vfs.ffs.doasyncfree: 1
>net.local.stream.sendspace: 8192
>net.local.stream.recvspace: 8192
>net.local.dgram.maxdgram: 2048
>net.local.dgram.recvspace: 4096
>net.local.inflight: 0
>net.inet.ip.portrange.lowfirst: 1023
>net.inet.ip.portrange.lowlast: 600
>net.inet.ip.portrange.first: 1024
>net.inet.ip.portrange.last: 5000
>net.inet.ip.portrange.hifirst: 49152
>net.inet.ip.portrange.hilast: 65535
>net.inet.ip.forwarding: 0
>net.inet.ip.redirect: 1
>net.inet.ip.ttl: 64
>net.inet.ip.rtexpire: 62
>net.inet.ip.rtminexpire: 10
>net.inet.ip.rtmaxcache: 128
>net.inet.ip.sourceroute: 0
>net.inet.ip.intr_queue_maxlen: 50
>net.inet.ip.intr_queue_drops: 0
>net.inet.ip.accept_sourceroute: 0
>net.inet.ip.fastforwarding: 0
>net.inet.ip.keepfaith: 0
>net.inet.ip.gifttl: 30
>net.inet.ip.subnets_are_local: 0
>net.inet.icmp.maskrepl: 0
>net.inet.icmp.icmplim: 200
>net.inet.icmp.drop_redirect: 0
>net.inet.icmp.log_redirect: 0
>net.inet.icmp.bmcastecho: 0
>net.inet.tcp.rfc1323: 0
>net.inet.tcp.rfc1644: 0
>net.inet.tcp.mssdflt: 512
>net.inet.tcp.keepidle: 7200000
>net.inet.tcp.keepintvl: 75000
>net.inet.tcp.sendspace: 16384
>net.inet.tcp.recvspace: 16384
>net.inet.tcp.keepinit: 75000
>net.inet.tcp.delacktime: 100
>net.inet.tcp.v6mssdflt: 1024
>net.inet.tcp.log_in_vain: 0
>net.inet.tcp.blackhole: 0
>net.inet.tcp.delayed_ack: 1
>net.inet.tcp.tcp_lq_overflow: 1
>net.inet.tcp.path_mtu_discovery: 1
>net.inet.tcp.slowstart_flightsize: 1
>net.inet.tcp.local_slowstart_flightsize: 65535
>net.inet.tcp.tcbhashsize: 512
>net.inet.tcp.pcbcount: 135
>net.inet.tcp.msl: 30000
>net.inet.tcp.always_keepalive: 1
>net.inet.udp.checksum: 1
>net.inet.udp.maxdgram: 9216
>net.inet.udp.recvspace: 42080
>net.inet.udp.log_in_vain: 0
>net.inet.udp.blackhole: 0
>net.inet.accf.unloadable: 0
>net.inet.raw.maxdgram: 8192
>net.inet.raw.recvspace: 8192
>net.link.generic.system.ifcount: 11
>net.link.ether.inet.prune_intvl: 300
>net.link.ether.inet.max_age: 1200
>net.link.ether.inet.host_down_time: 20
>net.link.ether.inet.maxtries: 5
>net.link.ether.inet.useloopback: 1
>net.link.ether.inet.proxyall: 0
>net.inet6.ip6.forwarding: 0
>net.inet6.ip6.redirect: 1
>net.inet6.ip6.hlim: 64
>net.inet6.ip6.maxfragpackets: 200
>net.inet6.ip6.accept_rtadv: 0
>net.inet6.ip6.keepfaith: 0
>net.inet6.ip6.log_interval: 5
>net.inet6.ip6.hdrnestlimit: 50
>net.inet6.ip6.dad_count: 1
>net.inet6.ip6.auto_flowlabel: 1
>net.inet6.ip6.defmcasthlim: 1
>net.inet6.ip6.gifhlim: 30
>net.inet6.ip6.kame_version: 20000701/FreeBSD-current
>net.inet6.ip6.use_deprecated: 1
>net.inet6.ip6.rr_prune: 5
>net.inet6.ip6.mapped_addr: 1
>net.inet6.ip6.rtexpire: 3600
>net.inet6.ip6.rtminexpire: 10
>net.inet6.ip6.rtmaxcache: 128
>net.inet6.icmp6.rediraccept: 1
>net.inet6.icmp6.redirtimeout: 600
>net.inet6.icmp6.errratelimit: 0
>net.inet6.icmp6.nd6_prune: 1
>net.inet6.icmp6.nd6_delay: 5
>net.inet6.icmp6.nd6_umaxtries: 3
>net.inet6.icmp6.nd6_mmaxtries: 3
>net.inet6.icmp6.nd6_useloopback: 1
>net.inet6.icmp6.nodeinfo: 1
>net.inet6.icmp6.errppslimit: 100
>net.inet6.icmp6.nd6_maxnudhint: 0
>debug.mddebug: 0
>debug.elf_trace: 0
>debug.boothowto: -2147483648
>debug.free_devt: 0
>debug.fdexpand: 13
>debug.sizeof.vnode: 164
>debug.sizeof.proc: 408
>debug.sizeof.specinfo: 76
>debug.sizeof.disklabel: 276
>debug.sizeof.diskslices: 1820
>debug.sizeof.disk: 296
>debug.ttydebug: 0
>debug.nchash: 32767
>debug.ncnegfactor: 16
>debug.numneg: 198
>debug.numcache: 3175
>debug.vfscache: 1
>debug.vnsize: 164
>debug.ncsize: 36
>debug.disablecwd: 0
>debug.disablefullpath: 0
>debug.numvnodes: 3547
>debug.wantfreevnodes: 25
>debug.freevnodes: 1171
>debug.rush_requests: 0
>debug.bpf_bufsize: 4096
>debug.bpf_maxbufsize: 524288
>debug.if_tun_debug: 0
>debug.do_tcpdrain: 1
>debug.ncr_debug: 0
>debug.max_softdeps: 260200
>debug.tickdelay: 2
>debug.blk_limit_push: 0
>debug.ino_limit_push: 0
>debug.blk_limit_hit: 0
>debug.ino_limit_hit: 0
>debug.indir_blk_ptrs: 0
>debug.inode_bitmap: 0
>debug.direct_blk_ptrs: 0
>debug.dir_entry: 0
>debug.dircheck: 0
>hw.machine: i386
>hw.model: Pentium III/Pentium III Xeon/Celeron
>hw.ncpu: 1
>hw.byteorder: 1234
>hw.physmem: 533127168
>hw.usermem: 496754688
>hw.pagesize: 4096
>hw.floatingpoint: 1
>hw.machine_arch: i386
>hw.atamodes:
>hw.availpages: 129991
>machdep.consdev: { major = 12, minor = 255 }
>machdep.adjkerntz: 18000
>machdep.disable_rtc_set: 0
>machdep.wall_cmos_clock: 1
>machdep.an_cache_mcastonly: 0
>machdep.an_cache_iponly: 1
>machdep.do_dump: 1
>machdep.pccard.pcic_resume_reset: 1
>machdep.enable_panic_key: 0
>machdep.apm_suspend_delay: 1
>machdep.apm_standby_delay: 1
>machdep.ispc98: 0
>machdep.msgbuf:
>machdep.msgbuf_clear: 0
>machdep.panic_on_nmi: 1
>machdep.i8254_freq: 1193182
>machdep.cs_recv_delay: 570
>machdep.wi_cache_mcastonly: 0
>machdep.wi_cache_iponly: 1
>machdep.conspeed: 9600
>user.cs_path: /usr/bin:/bin:/usr/sbin:/sbin:
>user.bc_base_max: 99
>user.bc_dim_max: 2048
>user.bc_scale_max: 99
>user.bc_string_max: 1000
>user.coll_weights_max: 0
>user.expr_nest_max: 32
>user.line_max: 2048
>user.re_dup_max: 255
>user.posix2_version: 199212
>user.posix2_c_bind: 0
>user.posix2_c_dev: 0
>user.posix2_char_term: 0
>user.posix2_fort_dev: 0
>user.posix2_fort_run: 0
>user.posix2_localedef: 0
>user.posix2_sw_dev: 0
>user.posix2_upe: 0
>user.stream_max: 20
>user.tzname_max: 255
>p1003_1b.asynchronous_io: 0
>p1003_1b.mapped_files: 0
>p1003_1b.memlock: 0
>p1003_1b.memlock_range: 0
>p1003_1b.memory_protection: 0
>p1003_1b.message_passing: 0
>p1003_1b.prioritized_io: 0
>p1003_1b.priority_scheduling: 1
>p1003_1b.realtime_signals: 0
>p1003_1b.semaphores: 0
>p1003_1b.fsync: 0
>p1003_1b.shared_memory_objects: 0
>p1003_1b.synchronized_io: 0
>p1003_1b.timers: 0
>p1003_1b.aio_listio_max: 0
>p1003_1b.aio_max: 0
>p1003_1b.aio_prio_delta_max: 0
>p1003_1b.delaytimer_max: 0
>p1003_1b.mq_open_max: 0
>p1003_1b.pagesize: 4096
>p1003_1b.rtsig_max: 0
>p1003_1b.sem_nsems_max: 0
>p1003_1b.sem_value_max: 0
>p1003_1b.sigqueue_max: 0
>p1003_1b.timer_max: 0
>jail.set_hostname_allowed: 1
>
>
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