<div dir="ltr"><div dir="ltr">Hi list,<br><br>I have decided to post here because I have some doubts with my DRBD status.<br><br>I have detected that there are some IO problems on my dedicated server that works with MySQL over DRBD cluster with Corosync+Pacemaker. Checking system status, I have seen that iostat shows overload with drbd device. Then, I have checked drbd status reading logs. In the corosync.log file appears the following line:<br>
<br>Jul 15 17:50:15 llwh747-y lrmd: [1390]: WARN: G_SIG_dispatch: Dispatch function for SIGCHLD was delayed 560 ms (> 100 ms) before being called (GSource: 0xa69e10)<br><br>I'm not sure if this warning is related with IO hard disk problems or if this warning can derivate in a bigger problem.<br>
<div class="gmail_default" style="color:rgb(68,68,68)"><br></div><div class="gmail_default" style="color:rgb(68,68,68)">Let me put iostat output.<br><br>==========================<br>root@llwh747-y:/usr/lib/nagios/plugins# iostat -dx 5 5<br>
Linux 2.6.32-5-amd64 (llwh747-y) 07/15/2014 _x86_64_ (4 CPU)<br><br>Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s avgrq-sz avgqu-sz await svctm %util<br>sda 0.12 21.22 1.45 1.26 175.27 177.73 130.17 0.16 59.48 1.99 0.54<br>
dm-0 0.00 0.00 0.05 0.12 1.29 0.94 13.07 0.00 13.49 2.31 0.04<br>dm-1 0.00 0.00 0.13 0.13 1.07 1.05 8.00 0.01 55.02 0.93 0.02<br>dm-2 0.00 0.00 0.07 1.13 7.20 9.02 13.54 0.02 19.09 2.34 0.28<br>
dm-3 0.00 0.00 1.31 20.84 165.70 166.72 15.00 0.39 17.62 0.11 0.24<br>sdb 0.80 33.38 2.97 11.57 30.15 355.90 26.55 0.28 19.60 7.28 10.59<br>dm-4 0.00 0.00 3.77 44.94 30.15 355.90 7.93 0.20 4.02 2.17 10.59<br>
drbd0 0.00 0.00 3.77 44.42 30.15 355.34 8.00 0.19 7.99 9.57 46.12<br><br>Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s avgrq-sz avgqu-sz await svctm %util<br>
sda 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00<br>dm-0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00<br>dm-1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00<br>
dm-2 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00<br>dm-3 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00<br>sdb 1.60 12.60 0.80 13.60 19.20 206.80 15.69 0.04 2.89 1.28 1.84<br>
dm-4 0.00 0.00 2.40 26.20 19.20 206.80 7.90 0.09 3.22 0.67 1.92<br>drbd0 0.00 0.00 2.40 25.80 19.20 206.40 8.00 8.81 3.83 35.46 100.00<br><br>
Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s avgrq-sz avgqu-sz await svctm %util<br>sda 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00<br>dm-0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00<br>
dm-1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00<br>dm-2 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00<br>dm-3 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00<br>
sdb 0.40 33.40 0.40 22.60 6.40 443.80 19.57 0.10 4.28 0.70 1.60<br>dm-4 0.00 0.00 0.80 56.00 6.40 443.80 7.93 0.29 5.03 0.28 1.60<br>drbd0 0.00 0.00 0.80 55.40 6.40 443.20 8.00 9.80 5.55 17.74 99.68<br>
<br>Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s avgrq-sz avgqu-sz await svctm %util<br>sda 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00<br>
dm-0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00<br>dm-1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00<br>dm-2 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00<br>
dm-3 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00<br>sdb 0.00 14.00 0.00 22.60 0.00 285.80 12.65 0.11 4.78 1.17 2.64<br>dm-4 0.00 0.00 0.00 36.60 0.00 285.80 7.81 0.18 5.01 0.72 2.64<br>
drbd0 0.00 0.00 0.00 35.60 0.00 284.80 8.00 9.30 6.22 28.02 99.76<br><br>Device: rrqm/s wrqm/s r/s w/s rsec/s wsec/s avgrq-sz avgqu-sz await svctm %util<br>
sda 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00<br>dm-0 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00<br>dm-1 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00<br>
dm-2 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00<br>dm-3 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00 0.00<br>sdb 3.40 71.80 1.40 22.20 38.40 745.00 33.19 0.11 4.54 1.29 3.04<br>
dm-4 0.00 0.00 4.80 94.00 38.40 745.00 7.93 0.83 8.40 0.31 3.04<br>drbd0 0.00 0.00 4.80 93.00 38.40 744.00 8.00 11.44 9.10 10.22 99.92<br><br>
==========================<br></div><div class="gmail_default" style="color:rgb(68,68,68)"><br></div>Please, let me know if you need any details (Configuraion or the output of any command).<br><br>I hope your help.<br><br>
Thanks in advance.<br><br>Regards,<br><br>Antonio.<br><span style="font-family:arial,sans-serif;border-collapse:collapse"><font><font style="font-size:13px" size="1"><font color="#000000"><font face="arial, sans-serif"><span style="font-style:normal"><span style="font-weight:normal"></span></span></font></font></font></font></span></div>
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