path: root/open_issues/system_stats.mdwn
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authorSamuel Thibault <>2015-02-18 00:58:35 +0100
committerSamuel Thibault <>2015-02-18 00:58:35 +0100
commit49a086299e047b18280457b654790ef4a2e5abfa (patch)
treec2b29e0734d560ce4f58c6945390650b5cac8a1b /open_issues/system_stats.mdwn
parente2b3602ea241cd0f6bc3db88bf055bee459028b6 (diff)
Revert "rename open_issues.mdwn to service_solahart_jakarta_selatan__082122541663.mdwn"
This reverts commit 95878586ec7611791f4001a4ee17abf943fae3c1.
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+[[!meta copyright="Copyright © 2012, 2013 Free Software Foundation, Inc."]]
+[[!meta license="""[[!toggle id="license" text="GFDL 1.2+"]][[!toggleable
+id="license" text="Permission is granted to copy, distribute and/or modify this
+document under the terms of the GNU Free Documentation License, Version 1.2 or
+any later version published by the Free Software Foundation; with no Invariant
+Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license
+is included in the section entitled [[GNU Free Documentation
+[[!tag open_issue_documentation]]There should be a page listing ways to get
+system statistics, how to interpret them, and some example/expected values.
+# IRC, frenode, #hurd, 2012-11-04
+ <mcsim> Hi, is that normal that memory cache "ipc_port" is 24 Mb already?
+ Some memory has been already swapped out.
+ <mcsim> Other caches are big too
+ <braunr> how many ports ?
+ <mcsim> 45922
+ <braunr> yes it's normal
+ <braunr> ipc_port 0010 76 4k 50 45937 302050
+ 24164k 4240k
+ <braunr> it's a bug in exim
+ <braunr> or triggered by exim, from time to time
+ <braunr> lots of ports are created until the faulty processes are killed
+ <braunr> the other big caches you have are vm_object and vm_map_entry,
+ probably because of a big build like glibc
+ <braunr> and if they remain big, it's because there was no memory pressure
+ since they got big
+ <braunr> memory pressure can only be caused by very large files on the
+ hurd, because of the limited page cache size (4000 objects at most)
+ <braunr> the reason you have swapped memory is probably because of a glibc
+ test that allocates a very large (more than 1.5 GiB iirc) block and fills
+ it
+ <mcsim> yes
+ <braunr> (a test that fails with the 2G/2G split of the debian kernel, but
+ not on your vanilla version btw)
+## IRC, frenode, #hurd, 2013-01-26
+ <braunr> ah great, one of the recent fixes (probably select-eintr or
+ setitimer) fixed exim4 :)