Reviewing ulimit settings for Teracloud® Streams

Use these commands to review ulimit settings for Teracloud® Streams users and services.

Note: The ulimit command output shows the ulimit settings for the user who runs the commands. For Teracloud® Streams users that require ulimit settings, ensure that their settings satisfy the Teracloud® Streams ulimit requirements.

Procedure

Review ulimit settings.
  • To review the hard ulimit settings, enter the following command:
    ulimit -aH
    Command output similar to the following example is displayed:
    
core file size          (blocks, -c) unlimited
data seg size           (kbytes, -d) unlimited
scheduling priority             (-e) 0
file size               (blocks, -f) unlimited
pending signals                 (-i) 100000
max locked memory       (kbytes, -l) unlimited
max memory size         (kbytes, -m) unlimited
open files                      (-n) 100000
pipe size            (512 bytes, -p) 8
POSIX message queues     (bytes, -q) 819200
real-time priority              (-r) 0
stack size              (kbytes, -s) unlimited
cpu time               (seconds, -t) unlimited
max user processes              (-u) 257262
virtual memory          (kbytes, -v) unlimited
file locks                      (-x) unlimited

  • To review the soft ulimit settings, enter the following command:
    ulimit -aS
    Command output similar to the following example is displayed:
    
core file size          (blocks, -c) 0
data seg size           (kbytes, -d) unlimited
scheduling priority             (-e) 0
file size               (blocks, -f) unlimited
pending signals                 (-i) 100000
max locked memory       (kbytes, -l) unlimited
max memory size         (kbytes, -m) unlimited
open files                      (-n) 100000
pipe size            (512 bytes, -p) 8
POSIX message queues     (bytes, -q) 819200
real-time priority              (-r) 0
stack size              (kbytes, -s) 10240
cpu time               (seconds, -t) unlimited
max user processes              (-u) 257262
virtual memory          (kbytes, -v) unlimited
file locks                      (-x) unlimited

  • To review the ulimit settings for a Teracloud® Streams service, enter the following command as user root: 
    cat /proc/PID/limits
    Run this command for each process on the resource. For example, you can find the domain controller service process ID (PID) by using the streamtool getdomainstate command. In the following example, the PID for the controller on host2.teracloud.com is 28350.
    
$ streamtool getdomainstate -d StreamsDomain --long --fmt %Nf
domain: StreamsDomain State: STARTED
Resource: host1.teracloud.com Status: RUNNING Services: WAITING:controller(22133) RUNNING:sws(22444)                     Tags:  Version: *4.2.0.0
Resource: host2.teracloud.com Status: RUNNING Services: RUNNING:aas(28511),auditlog(28511),controller(28350),jmx(13944)  Tags:  Version: *4.2.0.0
    The following example shows the ulimit values for the controller process:
    
$ sudo cat /proc/28350/limits
Limit                     Soft Limit           Hard Limit           Units     
Max cpu time              unlimited            unlimited            seconds   
Max file size             unlimited            unlimited            bytes     
Max data size             unlimited            unlimited            bytes     
Max stack size            8388608              unlimited            bytes     
Max core file size        0                    unlimited            bytes     
Max resident set          unlimited            unlimited            bytes     
Max processes             100000               100000               processes 
Max open files            100000               100000               files     
Max locked memory         65536                65536                bytes     
Max address space         unlimited            unlimited            bytes     
Max file locks            unlimited            unlimited            locks     
Max pending signals       7239                 7239                 signals   
Max msgqueue size         819200               819200               bytes     
Max nice priority         0                    0                    
Max realtime priority     0                    0                    
Max realtime timeout      unlimited            unlimited            us