AIX 虚拟内存管理（VMM）优化

AIX版本为

引用

#oslevel -r
5300-04

查看虚拟内存相关参数

引用

AIX_CZCX1:/oracle/softs#vmo -a
        cpu_scale_memp = 8
data_stagger_interval = 161
                 defps = 1
   force_relalias_lite = 0
             framesets = 2
             htabscale = n/a
     kernel_heap_psize = 4096
  large_page_heap_size = 0
          lgpg_regions = 0
             lgpg_size = 0
       low_ps_handling = 1
       lru_file_repage = 1
     lru_poll_interval = 10
             lrubucket = 131072
            maxclient% = 80
               maxfree = 1088
               maxperm = 216147
              maxperm% = 80
                maxpin = 240182
               maxpin% = 80
       mbuf_heap_psize = 4096
       memory_affinity = 1
         memory_frames = 294912
         memplace_data = 2
  memplace_mapped_file = 2
memplace_shm_anonymous = 2
    memplace_shm_named = 2
        memplace_stack = 2
         memplace_text = 2
memplace_unmapped_file = 2
              mempools = 2
               minfree = 960
               minperm = 54036
              minperm% = 20
             nokilluid = 0
               npskill = 16384
             npsrpgmax = 131072
             npsrpgmin = 98304
           npsscrubmax = 131072
           npsscrubmin = 98304
               npswarn = 65536
      num_spec_dataseg = 0
             numpsblks = 2097152
     page_steal_method = 0
          pagecoloring = n/a
       pinnable_frames = 210905
pta_balance_threshold = n/a
   relalias_percentage = 0
              rpgclean = 0
            rpgcontrol = 2
                 scrub = 0
            scrubclean = 0
soft_min_lgpgs_vmpool = 0
      spec_dataseg_int = 512
      strict_maxclient = 1
        strict_maxperm = 0
              v_pinshm = 0
  vm_modlist_threshold = -1
       vmm_fork_policy = 1
    vmm_mpsize_support = 1

由于该操作系统使用cio，优化以下参数

引用

AIX_CZCX1:/oracle/softs#vmo -p -o minperm%=5
Setting minperm% to 5 in nextboot file
Setting minperm% to 5
AIX_CZCX1:/oracle/softs#vmo -p -o maxclient%=20
Setting maxclient% to 20 in nextboot file
Setting maxclient% to 20
AIX_CZCX1:/oracle/softs#vmo -p -o maxperm%=20
Setting maxperm% to 20 in nextboot file
Setting maxperm% to 20
AIX_CZCX1:/oracle/softs#vmo -p -o v_pinshm=1
Setting v_pinshm to 1 in nextboot file
Setting v_pinshm to 1