On 4/21/16 11:24 , Gabriele Bulfon wrote: > I see...but I feel cpu was normal, memory was ok, disk space too...what may > be affecting unix domain sockets and hangs? > BTW, this is a sample output from the same zone, now that is responding fine. > Would you please give me some insights to what are the interesting numbers in > these cases?
Your e-mail client butchered the data. It's unreadable. So, no I can't. I strongly suggest that you read various articles on the USE method and the manual pages for these tools here. Robert > sonicle@cloudserver:~$ prstat -mL PID USERNAME USR SYS TRP TFL DFL LCK SLP > LAT VCX ICX SCL SIG PROCESS/LWPID 26840 sonicle 5.3 0.0 0.0 0.0 0.0 0.0 95 > 0.0 6 3 111 0 imapd/1 23455 sonicle 3.1 0.2 0.0 0.0 0.0 0.0 97 0.0 > 82 3 843 0 imapd/1 5952 sonicle 0.2 0.5 0.0 0.0 0.0 99 0.1 0.0 1K 1 > 13K 0 slapd/7sonicle@cloudserver:~$ vmstat kthr memory page > disk faults cpu r b w swap free re mf pi po fr > de sr s0 s1 s2 s3 in sy cs us sy id 0 0 0 20345404 1559380 416 1750 0 0 > 0 0 0 -0 18 4 99 5798 49801 17818 3 2 95sonicle@cloudserver:~$ mpstatCPU > minf mjf xcal intr ithr csw icsw migr smtx srw syscl usr sys wt idl 0 > 190 0 32 592 124 1826 11 101 81 0 2519 2 3 0 95 1 > 113 0 48 318 32 1411 3 69 71 0 4228 4 2 0 94 2 > 96 0 44 537 34 1157 3 61 67 0 4213 4 3 0 93 3 > 89 0 39 338 78 1220 3 68 75 0 3165 3 2 0 95 4 2 72 0 17 269 31 1174 5 48 64 0 2047 1 2 0 97 5 115 0 43 327 46 1271 3 57 69 0 3488 4 2 0 94 6 79 0 30 260 33 881 2 46 58 0 2622 3 1 0 96 7 91 0 49 336 51 1267 3 56 68 0 2930 4 2 0 95 8 77 0 25 257 39 719 3 42 48 0 2280 2 1 0 96 9 87 0 40 271 37 878 2 50 56 0 3109 4 1 0 95 10 95 0 48 284 45 950 2 52 58 0 3392 4 2 0 95 11 81 0 27 233 33 696 2 39 47 0 2836 3 1 0 96 12 83 0 47 327 46 1237 3 56 67 0 3383 4 2 0 95 13 88 0 31 346 134 899 2 46 57 0 3022 4 1 0 95 14 117 0 47 410 152 1264 3 57 68 0 4247 5 2 0 93 15 76 0 27 692 508 968 3 47 75 0 2319 2 2 0 96 > ---------------------------------------------------------------------------------------- > Sonicle S.r.l. > : > http://www.sonicle.com > Music: > http://www.gabrielebulfon.com > Quantum Mechanics : > http://www.cdbaby.com/cd/gabrielebulfon > ---------------------------------------------------------------------------------- > Da: Robert Mustacchi > [email protected] > Data: 21 aprile 2016 20.09.28 CEST > Oggetto: Re: [discuss] netstat -a hanging on domain sockets > On 4/21/16 11:07 , Gabriele Bulfon wrote: > Hi, > I had a strange situation on a server starting to respond very slow on almost > any deamon (tomcat/apache/ssh/cyrus). > While prstat/top did not show any high cpu usage (under 5%) and prstat -Z > didn't show any very high memory usage, and > swap look there unused...I tried running netstat -a to see how many sockets > where there serving. > The result was a very fast output of all the normal sockets, and then hanging > for 10-30 seconds before the output of active UNIX domain sockets. > I repeated the command some times, but didn't think about saving the output > somewhere, so I don't know what the domain sockets state was (which files, > where). > I can say the machine runs amavis / spamd / lmtpd /saslauthd / cyrus / > postfix / apache / tomcat / postgres for more than 600 users. > Is there anything I should look deeper about the domain socket usage? Is it > possible that they were so much busy slowing down > every socket (even ssh took 1 to 2 minutes to take me to the bash). > In general, you should use the -n option to netstat whenever you're > debugging so you're not generating a lot of dns resolutions. But when > you're looking at that kind of thing, you should start with your CPU > microstates for processes (usually the -mL options to prstat) and tools > like mpstat and vmstat. > Robert > ------------------------------------------- illumos-discuss Archives: https://www.listbox.com/member/archive/182180/=now RSS Feed: https://www.listbox.com/member/archive/rss/182180/21175430-2e6923be Modify Your Subscription: https://www.listbox.com/member/?member_id=21175430&id_secret=21175430-6a77cda4 Powered by Listbox: http://www.listbox.com
