Come liberare uno spazio di swap manualmente senza riavviare?

Sono su High Sierra su MacBook Pro con 16 GB di RAM con SSD.

Hai 15G di file di scambio, esiste un metodo per liberare spazio / file di scambio senza riavviare?

$ sysctl -a | grep swap
vm.swapusage: total = 15360.00M  used = 14468.75M  free = 891.25M  (encrypted)
vm.compressor_swapout_target_age: 0
vm.swapfileprefix: /private/var/vm/swapfile
debug.intel.swapCount: 0
$ ll -h /var/vm/swap*
-rw------- 1 root wheel 1.0G Apr 30 16:10 /var/vm/swapfile0
-rw------- 1 root wheel 1.0G Apr 30 17:16 /var/vm/swapfile1
-rw------- 1 root wheel 1.0G May 11 21:28 /var/vm/swapfile10
-rw------- 1 root wheel 1.0G May 11 21:46 /var/vm/swapfile11
-rw------- 1 root wheel 1.0G May 11 22:04 /var/vm/swapfile12
-rw------- 1 root wheel 1.0G May 11 23:00 /var/vm/swapfile13
-rw------- 1 root wheel 1.0G May 11 23:01 /var/vm/swapfile14
-rw------- 1 root wheel 1.0G May 11 23:02 /var/vm/swapfile15
-rw------- 1 root wheel 1.0G May  2 12:45 /var/vm/swapfile2
-rw------- 1 root wheel 1.0G May  4 14:02 /var/vm/swapfile3
-rw------- 1 root wheel 1.0G May  4 05:50 /var/vm/swapfile4
-rw------- 1 root wheel 1.0G May  8 11:05 /var/vm/swapfile5
-rw------- 1 root wheel 1.0G May  9 16:18 /var/vm/swapfile6
-rw------- 1 root wheel 1.0G May 10 03:02 /var/vm/swapfile7
-rw------- 1 root wheel 1.0G May 11 13:03 /var/vm/swapfile8
-rw------- 1 root wheel 1.0G May 11 21:07 /var/vm/swapfile9

Mi piacerebbe in qualche modo rilasciare questi file senza disattivare dynamic_pager .

Ho provato a:

• esegui sudo purge (forza la cache del disco da eliminare);
• esci da tutte le app che non sto utilizzando;

• prendi in giro il sistema creando file di scambio fittizi prima che vengano creati:

  cd /var/vm
  sudo touch swapfile{0..20} 2>/dev/null; sudo chmod 000 swapfile{0..20} 2>/dev/null
  

  ma non ha funzionato, poiché il sistema crea / modifica i file nonostante i permessi di 000 , strano.

Per qualche ragione, htop mostra la memoria virtuale come 532G, ma credo che sia un bug, dato che top sta mostrando meno usato.

Soprahtop/topmostrasolo2attivitàinesecuzione,445stannodormendo,laCPUnonèutilizzatamolto,mailkernelèoccupatoconloswappingtra15Gdifile.

Potreiriavviarlomadopoalcunigiorniquestoproblemasiripeteognisettimana.Idealmente,mipiacerebbeuccidereedistruggere(rimuovere)ifilediswapericominciarenellastessasessione,mamacOSnonmipermettedifarlo.

$sudorm-frswapfile*Password:rm:cannotremove'swapfile0':Operationnotpermitted

Sonodisponibilialcunihackperforzaredynamic_pagerarilasciarequestifile?Nonhobisognodicosìtanto.

Btw.Questifilediscambiosonovuoti!Vedi:

$sudostringsswapfile*swapfile0swapfile1swapfile10swapfile11swapfile12swapfile13swapfile2swapfile3swapfile4swapfile5swapfile6swapfile7swapfile8swapfile9/var/vm$sudogzipswapfile*/var/vm$ll-h*.gz-rw-------1rootwheel1.6MApr3016:10swapfile0.gz-rw-------1rootwheel1.6MApr3017:16swapfile1.gz-rw-------1rootwheel1.6MMay1121:28swapfile10.gz-rw-------1rootwheel1.6MMay1121:46swapfile11.gz-rw-------1rootwheel1.6MMay1122:04swapfile12.gz-rw-------1rootwheel1.6MMay1123:00swapfile13.gz-rw-------1rootwheel1.6MMay212:45swapfile2.gz-rw-------1rootwheel1.6MMay414:02swapfile3.gz-rw-------1rootwheel1.6MMay405:50swapfile4.gz-rw-------1rootwheel1.6MMay811:05swapfile5.gz-rw-------1rootwheel1.6MMay916:18swapfile6.gz-rw-------1rootwheel1.6MMay1003:02swapfile7.gz-rw-------1rootwheel1.6MMay1113:03swapfile8.gz-rw-------1rootwheel1.6MMay1121:07swapfile9.gz

Sequestisonovuoti,perchémacOSnonpuòsemplicementerimuoverli.Sonoabbastanzasicurochelamialentezzadelsistema(comecaricareavgeincluderespessoilcongelamentodelmouse)siacausatadaquestacostantecreazioneerimozionediquestifile,poichénonhoaltriprocessicheutilizzanomoltolamiaCPU.

Adesempio,primadiscriverequestopost,hoavuto13Gdifilediswap(1Gciascuno),durantelascritturael'incollamentosopral'outputhofinitocon15G(facendoquasinulla),quindimacOSeffettivamenterimossoswapfile14eswapfile15(quindi13Gdiswap)quandosiscrivequesto.Quindirimossoswapfile13durantelascritturadiquestafrase.Quindicreatofinoaswapfile16(16G)durantelascritturadiquestafrase.Erimossonuovamenteswapfile16durantelascritturadiquestafrase.Ecosìvia.Checasino.Sequestisonofilevuoti,perchémacOScontinuaacrearli,quandononhariempitonullalìdentro.

Altreinformazioni:

$sudolaunchctllist|greppager-0com.apple.dynamic_pager$launchctlprintsystem|grepdynamic_pager00com.apple.dynamic_pager$pswuax|grepdynamic_pager#Norunning?!$launchctldumpstate|grep-A20com.apple.dynamic_pager00com.apple.dynamic_pager--com.apple.dynamic_pager={activecount=0path=/System/Library/LaunchDaemons/com.apple.dynamic_pager.pliststate=waitingprogram=/sbin/dynamic_pagerarguments={/sbin/dynamic_pager}defaultenvironment={PATH=>/usr/bin:/bin:/usr/sbin:/sbin}environment={XPC_SERVICE_NAME=>com.apple.dynamic_pager}domain=com.apple.xpc.launchd.domain.systemminimumruntime=10exittimeout=5runs=1successivecrashes=0excessivecrashing=0lastexitcode=0

Eccouncampionedi1secondodelprocessoWindowServer,incuièstatospesoalmenounmezzosecondoperloscambio:

Command:WindowServerParent:launchd[1]Duration:1.01sSteps:10(100mssamplinginterval)Activecpus:8Fanspeed:2159rpmThread0x1abThreadname"VM_cswap_trigger"                      10 samples (1-10)         priority 91 (base 91)     cpu time 0.222s
  <IO tier 0>
 *10  call_continuation + 23 (kernel + 2098423) [0xffffff80004004f7] 1-10
   *10  ??? (kernel + 2882629) [0xffffff80004bfc45] 1-10
     *6  ??? (kernel + 2883102) [0xffffff80004bfe1e] 1-6
       *6  thread_block_reason + 175 (kernel + 2530911) [0xffffff8000469e5f] 1-6
         *6  ??? (kernel + 2534903) [0xffffff800046adf7] 1-6
           *6  machine_switch_context + 205 (kernel + 3578125) [0xffffff800056990d] 1-6
     *1  ??? (kernel + 2883122) [0xffffff80004bfe32] 7
       *1  ??? (kernel + 2885317) [0xffffff80004c06c5] 7
         *1  c_seg_do_minor_compaction_and_unlock + 303 (kernel + 2886351) [0xffffff80004c0acf] 7
           *1  c_seg_minor_compaction_and_unlock + 344 (kernel + 2887576) [0xffffff80004c0f98] (running) 7
     *2  ??? (kernel + 2883102) [0xffffff80004bfe1e] 8-9
       *2  thread_block_reason + 175 (kernel + 2530911) [0xffffff8000469e5f] 8-9
         *2  ??? (kernel + 2534903) [0xffffff800046adf7] 8-9
           *2  machine_switch_context + 205 (kernel + 3578125) [0xffffff800056990d] 8-9
     *1  ??? (kernel + 2883122) [0xffffff80004bfe32] 10
       *1  ??? (kernel + 2885317) [0xffffff80004c06c5] 10
         *1  c_seg_do_minor_compaction_and_unlock + 303 (kernel + 2886351) [0xffffff80004c0acf] 10
           *1  c_seg_minor_compaction_and_unlock + 633 (kernel + 2887865) [0xffffff80004c10b9] 10
             *1  kernel_memory_depopulate + 194 (kernel + 2976354) [0xffffff80004d6a62] 10
               *1  pmap_remove_options + 1124 (kernel + 3488404) [0xffffff8000553a94] 10
                 *1  pmap_remove_range_options + 1988 (kernel + 3485812) [0xffffff8000553074] (running) 10

  Thread 0x1ac              Thread name "VM_compressor"                         10 samples (1-10)         priority 91 (base 91)     cpu time 0.201s
  <IO tier 0>
 *6  call_continuation + 23 (kernel + 2098423) [0xffffff80004004f7] 1-6
   *6  vm_pageout_iothread_internal_continue + 1129 (kernel + 3134345) [0xffffff80004fd389] 1-6
     *6  vm_pageout_compress_page + 268 (kernel + 3135052) [0xffffff80004fd64c] 1-6
       *6  vm_compressor_pager_put + 160 (kernel + 2903904) [0xffffff80004c4f60] 1-6
         *6  vm_compressor_put + 1389 (kernel + 2900045) [0xffffff80004c404d] 1-6
           *1  WKdm_compress_new + 736 (kernel + 2092960) [0xffffff80003fefa0] (running) 1
           *1  WKdm_compress_new + 776 (kernel + 2093000) [0xffffff80003fefc8] (running) 2
           *1  WKdm_compress_new + 781 (kernel + 2093005) [0xffffff80003fefcd] (running) 3
           *1  WKdm_compress_new + 303 (kernel + 2092527) [0xffffff80003fedef] (running) 4
           *1  WKdm_compress_new + 748 (kernel + 2092972) [0xffffff80003fefac] (running) 5
           *1  WKdm_compress_new + 771 (kernel + 2092995) [0xffffff80003fefc3] (running) 6
 *1  vm_pageout_iothread_internal_continue + 0 (kernel + 3133216) [0xffffff80004fcf20] 7
 *1  call_continuation + 23 (kernel + 2098423) [0xffffff80004004f7] 8
   *1  vm_pageout_iothread_internal_continue + 1129 (kernel + 3134345) [0xffffff80004fd389] 8
     *1  vm_pageout_compress_page + 268 (kernel + 3135052) [0xffffff80004fd64c] 8
       *1  vm_compressor_pager_put + 127 (kernel + 2903871) [0xffffff80004c4f3f] (running) 8
 *2  vm_pageout_iothread_internal_continue + 0 (kernel + 3133216) [0xffffff80004fcf20] 9-10

  Thread 0x1ad              Thread name "VM_compressor"                         10 samples (1-10)         priority 91 (base 91)     cpu time 0.144s
  <IO tier 0>
 *3  call_continuation + 23 (kernel + 2098423) [0xffffff80004004f7] 1-3
   *3  vm_pageout_iothread_internal_continue + 1129 (kernel + 3134345) [0xffffff80004fd389] 1-3
     *3  vm_pageout_compress_page + 268 (kernel + 3135052) [0xffffff80004fd64c] 1-3
       *3  vm_compressor_pager_put + 160 (kernel + 2903904) [0xffffff80004c4f60] 1-3
         *3  vm_compressor_put + 1389 (kernel + 2900045) [0xffffff80004c404d] 1-3
           *1  WKdm_compress_new + 280 (kernel + 2092504) [0xffffff80003fedd8] (running) 1
           *1  WKdm_compress_new + 286 (kernel + 2092510) [0xffffff80003fedde] (running) 2
           *1  WKdm_compress_new + 309 (kernel + 2092533) [0xffffff80003fedf5] (running) 3
 *1  vm_pageout_iothread_internal_continue + 0 (kernel + 3133216) [0xffffff80004fcf20] 4
 *2  call_continuation + 23 (kernel + 2098423) [0xffffff80004004f7] 5-6
   *1  vm_pageout_iothread_internal_continue + 1187 (kernel + 3134403) [0xffffff80004fd3c3] 5
     *1  vm_page_free_list + 124 (kernel + 3219628) [0xffffff80005120ac] 5
       *1  vm_page_free_prepare_object + 146 (kernel + 3207826) [0xffffff800050f292] (running) 5
   *1  vm_pageout_iothread_internal_continue + 1129 (kernel + 3134345) [0xffffff80004fd389] 6
     *1  vm_pageout_compress_page + 304 (kernel + 3135088) [0xffffff80004fd670] (running) 6
 *4  vm_pageout_iothread_internal_continue + 0 (kernel + 3133216) [0xffffff80004fcf20] 7-10