16.4. 䞇䊖喙湩蕇溊

options "SHMALL=8192"
options "SHMMAX=\(SHMALL*PAGE_SIZE\)"

凹庯誊臯 4.0 潡蔙敘斷䔇䬽橸䔇臙䫘 bpatch 欆庺嘷嬉喙湩䔇 sysptsize 唚㔗垄滇劇媘䔇施唍媘攕螇䞖䔇㔗

$ bpatch -r sysptsize
0x9 = 9

䇽劯檪 SYSPTSIZE 媞櫹婺婘喙湩陉䘞桺傽麯䔇婔婻䇸傼乕唚㔗䫘 bpatch 䞖庺準䔇唚幽婫婺嘹驔襕䔇懟婻鵺崡䔇 4MB 噌庆喙庻喉媹 1 㔗

options "SYSPTSIZE=16"

sysptsize 婉脘䫘 sysctl 媞櫹㔗

options "SEMMNI=40"
options "SEMMNS=240"

䚺䩕螆䘞埻锗劽庯冽償䔇垬輙(懫套䚺䩕 SHMMAX 滇 32MB)㔗潏傸埇傖䫘 sysctl 潡 loader 毖埼準媞櫹㔗婋麵䔇埗昄埇傖䫘 sysctl 螆䘞

$ sysctl -w kern.ipc.shmall=32768
$ sysctl -w kern.ipc.shmmax=134217728
$ sysctl -w kern.ipc.semmap=256

襕愿螷認底螆䘞麉劇劯橬昽媞櫹 /etc/sysctl.conf 桺傽㔗

套悩䫘 sysctl 闼幽嬷婋䔇媇埙䕇螆䘞滇埻臂䔇嘖滇媇埙䕇埇傖婘劇媘䔇施唍婘 loader 柊䴺严婋螆䘞

(loader) set kern.ipc.semmni=256
(loader) set kern.ipc.semmns=512
(loader) set kern.ipc.semmnu=256

䌂嚚䔇認底婩薪埇傖婘 /boot/loader.conf 婺媺庻傖冪麉劇幋劯冺䇽橬昽㔗

嘹埇脘誻愿陉䘞喙湩檪噌庆喙庻輙蘘彄 RAM 麯镪噉傡傸赆庴扵彄庴扵彖寺婺㔗認底埇傖锔誺嘪䫘 sysctl 螆䘞 kern.ipc.shm_use_phys 準垂䯄㔗

套悩锔誺劇䫘 sysctl 䔇 security.jail.sysvipc_allowed 誊臯婘 FreeBSD jail 婺闼幽媙釂儖 postmaster 傖婉劯䔇䫘潙躆傘誊臯婘婉劯䔇 jail 婺㔗認湙橬媷庯嵂嚺垬噘攓啹婺垄黾溵庖麂 root 䫘潙幾欄婉劯 jail 婺䔇噌庆喙庻潡媇埙䕇幽婫噕螩 PostgreSQL IPC 橙䊖傼乕媘脘㔗婘 FreeBSD 6.0 埪幋劯䔇䬽橸婺IPC 橙䊖傼乕幽婉脘溼䇞冥敋婘噽垄 jail 婺䔇誕䘋啹溴方濘黾溵噽垄 jail 婺䔇 postmaster 誕䘋剹䫘䕩劯䔇䆇埼㔗

FreeBSD 4.0 幋嬉䔇䬽橸䌂嚚 NetBSD 启 OpenBSD (蓕婋桺)㔗

䚡臏喙湩施驔襕檪锬釹 SYSVSHM 启 SYSVSEM 欷嚔(䚺䩕滇欷嚔䔇)㔗噌庆喙庻䔇橔崓儺凩滇䫌锬釹 SHMMAXPGS(傖釕螇)喿垔䔇㔗婋麵滆䴺庖婔婻套嘘螆䘞認底埗昄䔇冋床(OpenBSD 嘪䫘䔇滇 option)

options        SYSVSHM
options        SHMMAXPGS=4096
options        SHMSEG=256

options        SYSVSEM
options        SEMMNI=256
options        SEMMNS=512
options        SEMMNU=256
options        SEMMAP=256

嘹埇脘婯橕儖噌庆喙庻髕婘 RAM 婺傖镪噉垄傸赆庴扵庺寂潏傸埇傖䫘 sysctl 螆䘞 kern.ipc.shm_use_phys 準垂䯄認婻䕞䔇㔗

䚺䩕螆䘞䩋準凹捞锔垬輙滇轿崘䔇庖㔗凹庯 HP-UX 10 SEMMNS 䔇庺寗䚺䩕滇 128 埇脘凹崓䔇昄扞康誗䗹準臘崻償庖㔗

IPC 埇傖婘 System Administration Manager 婋麵䔇 Kernel Configuration->Configurable Parameters 陉䘞㔗陉䘞垯庖傖劯显 Create A New Kernel 锬釹㔗

䚺䩕螆䘞埻锗劽償垬輙(䚺䩕橔崓噌庆喙庻滇 32MB)㔗婉誺噽垄䔇䚺䩕唚鄘䕩嘷崓锔婩婉驔襕櫹埻㔗橔崓䔇噌庆喙庻枕螆䘞埇傖䫘 sysctl 毖埼螆䘞㔗懫套襕噕螩 128MB 幽婫橔崓䔇攂噌庆喙庻昄婺 2097152 釕(䚺䩕)

$ sysctl -w kernel.shmmax=134217728
$ sysctl -w kernel.shmall=2097152

嘹埇傖檪認底螆䘞櫆彄 /etc/sysctl.conf 麯婘麉劇劯媺毕橬昽㔗

蔕䬽橸麯埇脘澇橬 sysctl 䘋废嘖滇劯湙䔇櫹埻埇傖锔誺淉嘩 /proc 桺傽係䂘準啔

$ echo 134217728 >/proc/sys/kernel/shmmax
$ echo 2097152 >/proc/sys/kernel/shmall

婘 OS X 10.2 傖埪敘斷䬽橸麯䚡膏 /System/Library/StartupItems/SystemTuning/SystemTuning 桺傽幽婫䫘婋彖变傴媞櫹認底昄唚

sysctl -w kern.sysv.shmmax
sysctl -w kern.sysv.shmmin
sysctl -w kern.sysv.shmmni
sysctl -w kern.sysv.shmseg
sysctl -w kern.sysv.shmall

婘 OS X 10.3 埪傖劯䔇䬽橸麯認底变傴䓂媘彄 /etc/rc 麯麵寂庖媙釂婘闼麯䚡膏㔗嘹驔襕麉桄劇媘欉脘螷螆䘞䫘昽㔗臙濘懟 /etc/rc 锔婩嚔赆 OS X 敘桄襖䕡(懫套 10.3.6 彄 10.3.7)欔傖懟渇敘桄劯嘹埇脘鄘驔襕麉桄䚡膏㔗

婘 OS X 10.3 埪傖劯䔇䬽橸麯鍴庖䚡膏 /etc/rc 幋崡嘹誻埇傖录傺婔婻劉婺 /etc/sysctl.conf 䔇桺傽寙劆套婋埻麟埪䕩庫䔇唚

kern.sysv.shmmax=4194304
kern.sysv.shmmin=1
kern.sysv.shmmni=32
kern.sysv.shmseg=8
kern.sysv.shmall=1024

認婻桹濘懫䚡膏 /etc/rc 桺傽襕喘啹婺認底螆䘞婘係䂘剺亓䔇施唍脘崘冖傖媺䘍㔗濘懟欔橬庫婻噌庆喙庻埗昄媙釂鄘婘 /etc/sysctl.conf 婺螆䘞劥彍儖嚔赆媘䘖㔗

誻襕濘懟橔誏䬽橸䔇 OS X 儖拐䂺檪 SHMMAX 䔇昄唚螆䘞婺麂 4096 䔇唉昄㔗

婘認婻广埄婪SHMALL 滇䫘 4KB 釕準庥麟䔇㔗

欔橬 OS X 䔇䬽橸鄘驔襕麉劇傖劯欉脘螷認底噌庆喙庻䔇埗昄螆䘞䫘昽㔗

䚺䩕陉䘞施埻噕螩懟枕 512KB 噌庆喙庻㔗襕嵂崓螆䘞饡噽誕噖 /etc/conf/cf.d 䕞嘘㔗襕滆䴺嘷嬉傖庖誗螄䔇 SHMMAX 誊臯

./configure -y SHMMAX

螆䘞 SHMMAX 䔇桄唚

./configure SHMMAX=value

認麯 value 滇嘹愿螆䘞䔇傖庖誗螄䔇桄唚㔗螆䘞垯 SHMMAX 傖劯麉桄䚡臏喙湩

./link_unix

䇽劯麉劇㔗

躿儏凹庯䬽橸 5.1 蔯蘔潏傸橬媙襕婺䌂嚚 SHMMAX 認湙䔇埗昄啔䬹枪䔇陉䘞啹婺認婻埗昄埇傖陉䘞婺欔橬喙垹鄘嘷嘩噌庆喙庻嘪䫘㔗認儌滇䌂嚚 DB/2 認湙䔇昄扞康婩䫘䔇陉䘞㔗

婉誺潏傸埇脘橬媙襕婘 /etc/security/limits 麯麵媞櫹噘匔 ulimit 媇敇啹婺桺傽崓償䔇䚺䩕䇸鍊彽(fsize)傖埪桺傽昄(nofiles)埇脘崻嘯庖㔗

躿儏彄䬽橸 2.6 婺溵噌庆喙庻枕䔇䚺䩕橔崓螆䘞凹 PostgreSQL 準臘滇崻嘯庖㔗䕩噿䔇螆䘞埇傖婘 /etc/system 麯麵媞櫹冋套

set shmsys:shminfo_shmmax=0x2000000
set shmsys:shminfo_shmmin=1
set shmsys:shminfo_shmmni=256
set shmsys:shminfo_shmseg=256

set semsys:seminfo_semmap=256
set semsys:seminfo_semmni=512
set semsys:seminfo_semmns=512
set semsys:seminfo_semmsl=32

嘹襕麉劇係䂘傴媞櫹䫘昽㔗

埽蓕 http://sunsite.uakom.sk/sunworldonline/swol-09-1997/swol-09-insidesolaris.html 诙埡噿庯 Solaris 麯麵䔇噌庆喙庻䔇媇敇㔗

婘 Unix Ware 7 婪䚺䩕陉䘞麯䔇橔崓噌庆喙庻枕滇 512kB 㔗襕滆䴺 SHMMAX 䔇嘷嬉唚誊臯

/etc/conf/bin/idtune -g SHMMAX

儌嚔滆䴺傖庖誗螄䔇嘷嬉䔇䚺䩕䔇橔償启橔崓唚㔗襕䂍 SHMMAX 螆䘞婔婻桄唚誊臯

/etc/conf/bin/idtune SHMMAX value

value 滇嘹愿螆䘞䔇傖庖誗螄䔇桄唚㔗螆䘞垯 SHMMAX 劯麉傺喙湩

/etc/conf/bin/idbuild -B

䇽劯麉劇㔗