Umbuzo: Useta njani iUlimit kwiLinux?

Izicwangciso ezingagqibekanga ziphantsi kakhulu kwiiseva zokusebenza eziphezulu kwaye kufuneka zonyuswe.

Ukutshintsha isethingi yenkcazo yefayile, hlela ifayile yeparamitha yekernel /etc/sysctl.conf.

Yongeza umgca fs.file-max=[ixabiso elitsha] kuyo.

Ukutshintsha isicwangciso solimit, hlela ifayile /etc/security/limits.conf kwaye usete imida enzima nethambileyo.

Ndiyenza njani ngokusisigxina iUlimit kwiLinux?

Procedure

• Ukuseta okanye uqinisekise amaxabiso olimit kwi-AIX: Ngena njengengcambu yomsebenzisi. Sebenzisa le miyalelo ilandelayo: chuser nofiles=32768 nofiles_hard=65536 admin_user_ID.
• Ukuseta okanye uqinisekise amaxabiso olimit kwi Linux: Ngena njengengcambu yomsebenzisi. Hlela ifayile /etc/security/limits.conf kwaye ucacise la maxabiso alandelayo:

Yintoni umyalelo weUlimit kwiLinux?

Ulimit Umyalelo. Iqokobhe linomyalelo owakhelwe ngaphakathi obizwa ngokuba yi "Ulimit" ekuvumela ukuba ubonise kwaye usete imida yemithombo yabasebenzisi. Izibonelelo zenkqubo zichazwe kwifayile ebizwa ngokuthi "/etc/security/limits.conf". I-Ulimit ingasetyenziswa ukujonga ezi zicwangciso.

Yintoni umda othambileyo kunye nomda onzima kwiLinux?

Umda onzima ngowona mkhulu ovunyelweyo kumsebenzisi, obekwe ngumsebenzisi ophezulu okanye ingcambu. Eli xabiso libekwe kwifayile /etc/security/limits.conf. Umsebenzisi unokunyusa umda othambileyo ngokwakhe ngamaxesha okudinga izixhobo ezingaphezulu, kodwa akanako ukuseta umda othambileyo ngaphezu komda onzima.

Ndiyitshintsha njani imida yomsebenzisi kwiLinux?

Ukuseta okanye uqinisekise amaxabiso olimit kwi Linux:

1. Ngena njengomsebenzisi weengcambu.
2. Hlela ifayile /etc/security/limits.conf kwaye ucacise la maxabiso alandelayo: admin_user_ID soft nofile 32768. admin_user_ID hard nofile 65536.
3. Ngena njengomlawuli_umsebenzisi_ID .
4. Qala kwakhona inkqubo: esadmin system stopall. esadmin inkqubo yokuqalisa.

Ndiwunyusa njani umda ovulekileyo kwiLinux?

Ukonyusa uMda weSichazi seFayile (Linux)

• Bonisa umda wangoku onzima womatshini wakho.
• Hlela i /etc/security/limits.conf kwaye wongeze imigca: * soft nofile 1024 * hard nofile 65535.
• Hlela i /etc/pam.d/login ngokongeza umgca: iseshoni efunekayo /lib/security/pam_limits.so.

Yintoni iLinux Nproc?

I-Nproc ichazwa kwinqanaba le-OS ukunciphisa inani leenkqubo ngomsebenzisi ngamnye. I-Oracle 11.2.0.4 uxwebhu lucebisa oku kulandelayo: i-oracle soft nproc 2047 i-oracle eqinile nproc 16384. Kodwa oko kuhlala kuphantsi kakhulu, ngakumbi xa unommeli woMphathi weShishini okanye ezinye iinkqubo ze-java ezisebenzayo.

Zeziphi iifayile ezivuliweyo kwiLinux?

lsof intsingiselo 'LiSt Open Files' isetyenziselwa ukufumana ukuba zeziphi iifayile ezivulwa ngeyiphi inkqubo. Njengoko sonke siyazi i-Linux / i-Unix iqwalasela yonke into njengefayile (imibhobho, iziseko, izikhokelo, izixhobo njl. Esinye sezizathu zokusebenzisa umyalelo we-lsof kuxa idiski ingenakohliswa njengoko isithi iifayile ziyasetyenziswa.

Yintoni eyona fayile yokulahla kwiLinux?

Ukulahla okungundoqo yifayile equlethe indawo yedilesi yenkqubo (inkumbulo) xa inkqubo iphela ngokungalindelekanga. Ukulahla okungundoqo kunokuveliswa xa kukho imfuno (efana ne-debugger), okanye ngokuzenzekelayo xa kucinywa.

Ndiwutshintsha njani umda wenkcazo yefayile kwiLinux?

Ukutshintsha inani leenkcazo zefayile kwiLinux, yenza oku kulandelayo njengengcambu yomsebenzisi:

1. Hlela umgca olandelayo kwifayile /etc/sysctl.conf: fs.file-max = ixabiso. ixabiso ngumda wenkcazelo yefayile entsha ofuna ukuyibeka.
2. Faka utshintsho ngokwenza lo myalelo ulandelayo: # /sbin/sysctl -p. Phawula:

Uthini umahluko phakathi komda othambileyo nonzima?

Kukho iindidi ezimbini zemida ezinokumiselwa kwipropati nganye edweliswe ngasentla, umda onzima kunye othambileyo. Umda onzima awunakuguqulwa ngumsebenzisi xa sele ubekiwe. Umda othambileyo, nangona kunjalo, unokutshintshwa ngumsebenzisi kodwa awunakudlula umda onzima okt Inokuba nexabiso eliphantsi elingu-0 kunye nexabiso eliphezulu elilingana 'nomda onzima'.

Kuthetha ukuthini umda onzima?

Umda onzima unokubhekisa koku: Ukucofa (ukusetyenzwa komqondiso), apho 'umlinganiselo onzima' ufinyeza umqondiso we-elektroniki kumda othile. Imida (BDSM), apho 'umda onzima' ngumsebenzi okanye umxholo womsebenzi uthathwa njengongathintelwanga ngokupheleleyo kwimiboniso yeBDSM kunye nobudlelwane.

Uthini umahluko phakathi komda webhloko ethambileyo neqinileyo?

Nangona kunjalo, umlawuli wenkqubo unokumisela umda othambileyo (ngamanye amaxesha ubhekiswa kuwo njengesabelo-mali) esinokugqithwa okwethutyana ngumsebenzisi. Umda othambileyo kufuneka ube ngaphantsi komda onzima. Umzekelo, masithi umsebenzisi unomda othambileyo we-10,000 yeebhloko kunye nomda onzima we-12,000 yeebhloko.

Ndilitshintsha njani ixabiso lam le-Ulimit?

Ukucwangcisa amaxabiso oliut kwi node computer

• Yiya kwi/etc/security directory.
• Vula i limits.conf ifayile yokuhlela.
• Yongeza le migca ilandelayo kwifayile: @root soft nofile 10240 @root hard nofile 16384 * soft nofile 10240 * hard nofile 16384.
• Gcina kwaye uvale ifayile.
• Qala kwakhona ikhompyutha ukuze utshintsho lusebenze.

Yintoni i-Ulimit kwi-Unix?

Imida yezibonelelo kwiinkqubo zeUNIX (umlinganiselo) Kwiinkqubo zeUNIX, umyalelo wolimit ulawula umda kwindlela yobutyebi, njengobungakanani bedatha yenkqubo, qhubekekisa inkumbulo yenyani, kunye nobungakanani befayile yenkqubo. Ngokukodwa: Kwiinkqubo zeSolaris, ngokungagqibekanga, umsebenzisi wengcambu unokufikelela okungenamkhawulo kwezi zixhobo (umzekelo, ngokungenasiphelo).

Ndilinciphisa njani inani leenkqubo kwiLinux?

Kuba iyifayile, /proc/sys/kernel/pid_max inokuhlolwa kulo naluphi na ulwimi lwenkqubo olukwaziyo. kwi /etc/sysctl.conf. I-4194303 ngowona mda uphezulu we-x86_64 kunye no-32767 we-x86. Impendulo emfutshane kumbuzo wakho : Inani lenkqubo enokwenzeka kwinkqubo ye-linux AYI-UNLIMITED.

Yintoni iifayile ezivulekileyo kwi-Ulimit?

KwiLinux, ungatshintsha ubuninzi beefayile ezivuliweyo. Ungaliguqula kancinane eli nani ngokusebenzisa ulwimit umyalelo. Ikunika amandla okulawula izixhobo ezikhoyo kwiqokobhe okanye inkqubo eqalwe ngalo. Funda Kwakhona: Cwangcisa iMida yokuSebenza kweLinux kwiNqanaba loMsebenzisi ngamnye.

Uyivula njani ifayile kwiLinux?

Icandelo 1 Itheminali yokuvula

1. Indawo evulekileyo.
2. Chwetheza u-ls kwiSimina, emva koko ucinezele ↵ Ngena.
3. Fumana uvimba weefayili onqwenela ukwenza kuwo ifayile yokubhaliweyo.
4. Cd isilawuli .
5. Cinezela ↵ Ngena.
6. Gqiba ngenkqubo yokuhlela umbhalo.

Zeziphi iifayile ezivulelekileyo ezininzi kakhulu?

Unobangela. "Iifayile ezininzi ezivulekileyo" iimpazamo zenzeka xa inkqubo ifuna ukuvula iifayile ezininzi kunokuba zivunyelwe yinkqubo yokusebenza. Eli nani lilawulwa lelona nani liphezulu leenkcazo zefayile inkqubo enalo.

Yintoni i-Ulimit?

I-Ulimit linani leenkcazo zefayile evulekileyo ngenkqubo nganye. Yindlela yokucutha inani lemithombo eyahlukeneyo inkqubo enokuyisebenzisa.

Ujonga njani ukuba zingaphi iicpus ezikhoyo kwiLinux?

Ungasebenzisa enye yezi ndlela zilandelayo ukumisela inani le-CPU cores.

• Bala inani le-id eyodwa engundoqo (ilingane ngokulinganayo negrep -P '^core id\t' /proc/cpuinfo. |
• Phindaphinda-phinda inani le 'cores ngokwesokethi' ngenani leesokethi.
• Bala inani lee-CPU ezinengqondo ezizodwa njengoko zisetyenziswa yiLinux kernel.

Yintoni imida Conf Nproc?

– Umda ongagqibekanga weenkqubo zomsebenzisi uchazwe kwifayile /etc/security/limits.d/90-nproc.conf (RHEL5, RHEL6), /etc/security/limits.d/20-nproc.conf (RHEL7), ukunqanda ukuchaswa ngonya kwenkonzo, okufana neebhombu zefolokhwe.

Ijonga njani ifayile iphatha iLinux?

I-Linux: Fumana ukuba zingaphi iiNkcazo zeFayile ezisetyenziswayo

1. Inyathelo #1 Fumana i-PID. Ukufumana i-PID yenkqubo ye-mysqld, ngenisa:
2. Inyathelo # 2 Uluhlu lweFayile Ivulwe yiPID # 28290. Sebenzisa lsof umyalelo okanye /proc/$PID/ inkqubo yefayile ukubonisa iifds ezivulekileyo (izichazi zefayile), sebenzisa:
3. Ingcebiso: Bala zonke iiHandle zeFayile ezivuliweyo.
4. Okungakumbi malunga ne/proc/PID/file & procfs Inkqubo yeFayile.

Yintoni isichazi sefayile kwiLinux?

Kwi-Unix kunye neenkqubo zokusebenza zekhompyutheni ezihambelanayo, inkcazo yefayile (i-FD, i-fildes engaphantsi rhoqo) isalathisi esingabonakaliyo (isibambo) esisetyenziselwa ukufikelela kwifayile okanye enye igalelo / i-output resource, njengombhobho okanye i-socket network. Izichazi zefayile zenza inxalenye yojongano lwenkqubo yesicelo sePOSIX.

Ngaba utshintsho lwe-Ulimit lufuna ukuqalisa kwakhona?

Ukuseta okwethutyana umda weefayile ezivuliweyo zomsebenzisi ongene phantsi ngoku (umzekelo 'ingcambu'):Ungasebenzisa nomyalelo wolimit ukutshintsha amaxabiso kwiqokobhe lakho langoku. Iinkqubo ezisebenza njengengcambu zinokutshintsha imida ngaphandle kwesizathu; ezinye iinkqubo azikwazi ukunyusa imida enzima.

Ngaba i-50 Shades ye-GRY yeyona ncwadi ithengiswa kakhulu?

I-Fifty Shades of Grey ibe yeyona ncwadi ithengiswa kakhulu eBritani ukusukela oko kwaqala iirekhodi, ukodlula uHarry Potter kunye ne-Deathly Hallows ngokuthengiswa kweekopi ezizigidi ezi-5.3. I-Random House, umshicileli, uthe le ncwadi ngoku idume kakhulu kuneKhowudi yeNdlela ePhezulu.

Yintoni umlinganiselo othambileyo?

Izabelo ezinzima zithintela abasebenzisi ekubhaleni idatha kwidiski. Ngezabelo ezinzima, into eluncedo inciphisa ngokuzenzekelayo isithuba sediski somsebenzisi sakho, kwaye akukho basebenzisi banikwa ngaphandle. Nje ukuba abasebenzisi bafikelele kwisabelo sabo, beza kuwe befuna uncedo. Izabelo ezithambileyo zikuthumela izilumkiso xa abasebenzisi sele beza kugqithisa isithuba sediski.

Yintoni ubungakanani besitaki seLinux?

Uphawu lophawu lwesipaki luzakuchaza ubuncinci besayizi yestakhi (ngeebhayithi) eyabelwe isitaki semisonto esenziweyo. Kumzekelo wakho, ubungakanani bestakhi bumiselwe ku 8388608 bytes engqamana no 8MB, njengoko ibuyiswe ngumyalelo ulimit -s Ngoko ke iyahambelana. Kwi-Linux/x86-32, ubungakanani besitaki esingagqibekanga somsonto omtsha ziimegabytes ezi-2.

Ifoto kwinqaku nge "Wikimedia Commons" https://commons.wikimedia.org/wiki/File:Redox_VM.png