 Rank: Guest Joined: 5/24/2017(UTC) Posts: 1 
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Hello guys, Hope this is the right place. I have done a lot of googling and could only find a few references to this issue: http://forum.screenconne...2903_High-CPU-usage.aspxThis one was from a while ago with a much lower version. Is this still an issue with Linux? Every time I try and migrate our ScreenConnect server from Windows to Linux, once I start it up Mono CPU usage shoots to %150~. We have around 3700 clients on our machine. These are running in EC2 instances, large size (8gb ram 2cpus). CPU usage stays below 50 percent on Windows instance at all times. Windows is running versions 6.0, after the linux install it's running 6.2 because the upgrade script that converts the web.config, does this automatically. I have tried following this guide: https://docs.connectwise...allation_to_a_new_serveras well as copying the whole folder and running the install. I have everything "working" (ssl, sever, etc.) but it is so dead slow it is unusable. I have left it running for over 3 hours to see if everything just needed to 'check in' but still nothing. I can login but each page takes 5+ minutes to open (even on meetings page which we don't use). I have tried this on Ubuntu 14.04, 16.04, centos 7.3, all of them fully updated and all the same issue. Using IOtop I see no disk write, it uses very little memory and I have no iowait. All I can see is massive cpu usage. All ports are opened correctly using tcpdump I can see traffic going both in and out. After all this, I'm wondering. Is this still a bug with linux? Code:top - 07:38:53 up 23 min, 2 users, load average: 1.23, 1.77, 1.50
Tasks: 133 total, 2 running, 131 sleeping, 0 stopped, 0 zombie
%Cpu(s): 69.5 us, 0.5 sy, 0.0 ni, 30.0 id, 0.0 wa, 0.0 hi, 0.0 si, 0.0 st
KiB Mem : 8173748 total, 7163884 free, 510812 used, 499052 buff/cache
KiB Swap: 0 total, 0 free, 0 used. 7391924 avail Mem
PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND
2249 root 20 0 2091320 700532 289252 S 140.3 8.6 27:18.12 mono
1 root 20 0 37908 5872 3900 S 0.0 0.1 0:01.95 systemd
iotop shows almost no disk write after running for more than a minute Code:Total DISK READ : 0.00 B/s | Total DISK WRITE : 0.00 B/s
Actual DISK READ: 0.00 B/s | Actual DISK WRITE: 0.00 B/s
PID PRIO USER DISK READ DISK WRITE SWAPIN IO> COMMAND
316 be/3 root 0.00 B 8.00 K 0.00 % 0.01 % [jbd2/xvda1-8]
using strace I see the same thing over and over again Code:
strace: Process 2249 attached
rt_sigsuspend(~[INT QUIT ABRT TERM XCPU RTMIN RT_1], 8) = ? ERESTARTNOHAND (To be restarted if no handler)
--- SIGXCPU {si_signo=SIGXCPU, si_code=SI_TKILL, si_pid=2249, si_uid=0} ---
rt_sigreturn({mask=~[INT QUIT ABRT KILL STOP RTMIN RT_1]}) = -1 EINTR (Interrupted system call)
futex(0x965cc0, FUTEX_WAKE_PRIVATE, 1) = 1
rt_sigreturn({mask=[TERM]}) = -1 EINTR (Interrupted system call)
rt_sigtimedwait([TERM], NULL, NULL, 8) = -1 EINTR (Interrupted system call)
--- SIGPWR {si_signo=SIGPWR, si_code=SI_TKILL, si_pid=2249, si_uid=0} ---
rt_sigsuspend(~[INT QUIT ABRT TERM XCPU RTMIN RT_1], 8) = ? ERESTARTNOHAND (To be restarted if no handler)
--- SIGXCPU {si_signo=SIGXCPU, si_code=SI_TKILL, si_pid=2249, si_uid=0} ---
rt_sigreturn({mask=~[INT QUIT ABRT KILL STOP RTMIN RT_1]}) = -1 EINTR (Interrupted system call)
rt_sigreturn({mask=[TERM]}) = -1 EINTR (Interrupted system call)
rt_sigtimedwait([TERM], NULL, NULL, 8) = -1 EINTR (Interrupted system call)
--- SIGPWR {si_signo=SIGPWR, si_code=SI_TKILL, si_pid=2249, si_uid=0} ---
rt_sigsuspend(~[INT QUIT ABRT TERM XCPU RTMIN RT_1], 8) = ? ERESTARTNOHAND (To be restarted if no handler)
--- SIGXCPU {si_signo=SIGXCPU, si_code=SI_TKILL, si_pid=2249, si_uid=0} ---
rt_sigreturn({mask=~[INT QUIT ABRT KILL STOP RTMIN RT_1]}) = -1 EINTR (Interrupted system call)
rt_sigreturn({mask=[TERM]}) = -1 EINTR (Interrupted system call)
rt_sigtimedwait([TERM], NULL, NULL, 8) = -1 EINTR (Interrupted system call)
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