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</o:shapelayout></xml><![endif]--></head><body lang=EN-US link="#0563C1" vlink="#954F72"><div class=WordSection1><p class=MsoNormal>Hey OpenVZ users,<o:p></o:p></p><p class=MsoNormal>I’m currently encountering a weird issue but don’t know how to fix it.<o:p></o:p></p><p class=MsoNormal>Some containers on our node are freaking out sometimes. That’s not the issue. It’s customer related.<o:p></o:p></p><p class=MsoNormal>However they take the node almost down. The host node has an IO delay of 30-50% at that time and needs about 5 minutes to<o:p></o:p></p><p class=MsoNormal>Become stable again. SSH login is (almost) impossible. Shell is not running properly.<o:p></o:p></p><p class=MsoNormal><br>Dmesg reports the following:<o:p></o:p></p><p class=MsoNormal>__ratelimit: 1892 callbacks suppressed<o:p></o:p></p><p class=MsoNormal>Fatal resource shortage: privvmpages, UB 371.<o:p></o:p></p><p class=MsoNormal>Fatal resource shortage: privvmpages, UB 371.<o:p></o:p></p><p class=MsoNormal>Fatal resource shortage: privvmpages, UB 371.<o:p></o:p></p><p class=MsoNormal>Fatal resource shortage: privvmpages, UB 371.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>After taking a look at the bean counters of that container I got the following:<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>----------------------------------------------------------------<o:p></o:p></p><p class=MsoNormal>CT 371 | HELD Bar% Lim%| MAXH Bar% Lim%| BAR | LIM | FAIL<o:p></o:p></p><p class=MsoNormal>-------------+---------------+---------------+-----+-----+------<o:p></o:p></p><p class=MsoNormal> kmemsize|45.8M - - | 223M - - | - | - | -<o:p></o:p></p><p class=MsoNormal> lockedpages| - - - | 32K - - | 4G| 4G| -<o:p></o:p></p><p class=MsoNormal> privvmpages|3.25G 27% 27%| 12G 100% 100%| 12G| 12G| 303K<o:p></o:p></p><p class=MsoNormal> shmpages| 114M - - | 147M - - | - | - | -<o:p></o:p></p><p class=MsoNormal> numproc| 127 - - | 318 - - | - | - | -<o:p></o:p></p><p class=MsoNormal> physpages|1.08G - 26%| 4G - 100%| - | 4G| -<o:p></o:p></p><p class=MsoNormal> vmguarpages| - - - | - - - | 8G| - | -<o:p></o:p></p><p class=MsoNormal> oomguarpages|1008M 24% - |2.45G 61% - | 4G| - | -<o:p></o:p></p><p class=MsoNormal> numtcpsock| 31 - - | 173 - - | - | - | -<o:p></o:p></p><p class=MsoNormal> numflock| 21 - - | 48 - - | - | - | -<o:p></o:p></p><p class=MsoNormal> numpty| - - - | 1 - - | - | - | -<o:p></o:p></p><p class=MsoNormal> numsiginfo| - - - | 102 - - | - | - | -<o:p></o:p></p><p class=MsoNormal> tcpsndbuf|1.22M - - |16.6M - - | - | - | -<o:p></o:p></p><p class=MsoNormal> tcprcvbuf| 496K - - | 2.7M - - | - | - | -<o:p></o:p></p><p class=MsoNormal> othersockbuf|81.3K - - |5.72M - - | - | - | -<o:p></o:p></p><p class=MsoNormal> dgramrcvbuf| - - - | 117K - - | - | - | -<o:p></o:p></p><p class=MsoNormal> numothersock| 66 - - | 284 - - | - | - | -<o:p></o:p></p><p class=MsoNormal> dcachesize|24.8M - - | 178M - - | - | - | -<o:p></o:p></p><p class=MsoNormal> numfile|2.69K - - |3.13K - - | - | - | -<o:p></o:p></p><p class=MsoNormal> numiptent| 62 - - | 62 - - | - | - | -<o:p></o:p></p><div style='mso-element:para-border-div;border:none;border-bottom:solid windowtext 1.0pt;padding:0cm 0cm 1.0pt 0cm'><p class=MsoNormal style='border:none;padding:0cm'> swappages| 367M - 9%| 986M - 24%| - | 4G| -<o:p></o:p></p></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>A failure count of 300.000 on privvmpages is not normal. However I’m using vSWAP and the RAM is limited to 12G.<o:p></o:p></p><p class=MsoNormal>Node has 30GB of 64GB free, so that’s not the issue.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Anyone has a clue, why the host is almost going down? A single container shouldn’t affect the hosts performance.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Currently running pve-kernel-2.6.32-43-pve: 2.6.32-166(pve-kernel-2.6.32-43-pve: 2.6.32-166) with vzctl 4.9-4.<o:p></o:p></p><p class=MsoNormal>Containers are using the ploop layout and are laying on a LVM(root lvm partition).<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>Thank you for your time.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>-----------------------------------------------------------------------------------------<o:p></o:p></p><p class=MsoNormal>If you have any further questions, please let us know.<o:p></o:p></p><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><span lang=DE>Mit freundlichen Grüßen / With best regards <o:p></o:p></span></p><p class=MsoNormal>Henry Spanka | myVirtualserver Development Team<o:p></o:p></p></div></body></html>