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[Expired for LinuxDC++ because there has been no activity for 60 days.]

** Changed in: linuxdcpp
       Status: Incomplete => Expired

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https://bugs.launchpad.net/bugs/600815

Title:
  (Open)Solaris hashing memory issue

Status in Linux DC++:
  Expired

Bug description:
  LinuxDC++ rev 374. OpenSolaris b134.

  When using "fast hashing", I see loads of memory getting lost. It is
  freed eventually, but it forces by ZFS cache size down which is bad.
  If I limit the hashing speed to something ... significantly lower than
  the full speed (81MB/s with "fast hashing"), the pages are freed as
  they should be, and memory usage is much better.

  If I turn off fast hashing, I get around 90MB/s (ie 10% faster), and
  no more spurious RAM usage. As below.

  #fast hashing, unconstrained
  $ echo '::memstat' | pfexec mdb -k                        
  Page Summary                Pages                MB  %Tot
  ------------     ----------------  ----------------  ----
  Kernel                     624357              2438   30%
  ZFS File Data              452437              1767   22%
  Anon                       359060              1402   17%
  Exec and libs                5295                20    0%
  Page cache                 578750              2260   28%     <<<<-----------
  Free (cachelist)            66261               258    3%
  Free (freelist)              6664                26    0%
   
  Total                     2092824              8175
  Physical                  2092823              8175
   
  #fast hashing, limited to 5MB/s
  $ echo '::memstat' | pfexec mdb -k
  Page Summary                Pages                MB  %Tot
  ------------     ----------------  ----------------  ----
  Kernel                     632897              2472   30%
  ZFS File Data              756611              2955   36%
  Anon                       359078              1402   17%
  Exec and libs                5288                20    0%
  Page cache                  24568                95    1%     <<<<-----------
  Free (cachelist)           308583              1205   15%
  Free (freelist)              5799                22    0%
   
  Total                     2092824              8175
  Physical                  2092823              8175

  #slow hashing, unlimited
  $ echo '::memstat' | pfexec mdb -k
  Page Summary                Pages                MB  %Tot
  ------------     ----------------  ----------------  ----
  Kernel                     606479              2369   29%
  ZFS File Data             1015465              3966   49%
  Anon                       363770              1420   17%
  Exec and libs                5248                20    0%
  Page cache                  16605                64    1%     <<<<-----------
  Free (cachelist)            48231               188    2%
  Free (freelist)             37026               144    2%

  Total                     2092824              8175
  Physical                  2092823              8175