Mumwe wenhengo dzesocial network development team Facebook, Roman Gushchin, inokurudzirwa mune yevagadziri vekutumira rondedzero seti ye Linux kernel patchesyakanangana nekuvandudza ndangariro manejimendi kuburikidza nekushandiswa kweiyo nyowani yekurangarira manejimendi controller - slab (slab memory controller).
kugovera slab iMemory Management Mechanicha yakagadzirirwa kugovera ndangariro zvakanyanya uye kubvisa kupatsanuka kwakakosha. Hwaro hweiyi algorithm ndeyekuchengetedza yakagoverwa ndangariro ine chinhu cheimwe mhando uye kushandisa zvakare ndangariro iyo nguva inotevera yainopihwa chinhu chemhando imwe chete. Iyi nzira yakatanga kuunzwa muSunOS naJeff Bonwick uye ikozvino yave kushandiswa zvakanyanya mumakernels eUnix akawanda anoshanda masisitimu, anosanganisira FreeBSD neLinux.
Iyo nyowani controller yakavakirwa pakufambisa slab accounting kubva kundangariro peji nhanho kuenda kune kernel chinhu nhanho, izvo zvinoita kuti zvikwanise kugovera imwe slab peji mumapoka akasiyana, pane kugovera yakaparadzana cache yeboka rega rega.
Zvichienderana nemhedzisiro yebvunzo, zvinotevera kuti yakarongwa yekurangarira manejimendi nzira inobvumira kuwedzera zvinobudirira kushandisa slab kusvika 45%, uye zvakare ichadzikisa iyo yese yekurangarira kushandiswa kweiyo OS kernel. Zvakare, nekudzikisa huwandu hwemapeji akagoverwa kune slab, kupatsanurwa kwendangariro sese kwakaderedzwa, izvo zvisingakwanisi asi kukanganisa mashandiro ehurongwa.
Mutongi mutsva akaedzwa pakugadzirwa kwepa Facebook maseva kwemwedzi yakati wandei, uye kusvika pari zvino kuyedzwa uku kunogona kunzi kwakabudirira: pasina kurasikirwa mukuita uye pasina kuwedzera kwehuwandu hwekukanganisa, kuderera kwakajeka kwekushandisa ndangariro kwakaonekwa - pane zvimwe. maseva anosvika 1GB. Iyi nhamba ndeyekuzvimiririra, semuenzaniso, bvunzo dzekutanga dzakaratidza zvishoma zvakaderera mhedzisiro:
- 650-700 MB pawebhu pamberi
- 750-800 MB pane server ine database cache
- 700 MB paDNS server
Source: linux.org.ru