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Linux: limit on open file descriptors
On linux a limit can be imposed on the number of Linux, set the "open files" limit for the user that will run Tomcat to at least 50,000. By default this value is set to 1024. This setting controls the number of open file descriptors a user can have. You can see the current limit by running the ulimit command:
| Code Block | ||
|---|---|---|
| ||
> ulimit -a core file size (blocks, -c) 0 data seg size (kbytes, -d) unlimited scheduling priority (-e) 0 file size (blocks, -f) unlimited pending signals (-i) 3889 max locked memory (kbytes, -l) 64 max memory size (kbytes, -m) unlimited open files (-n) 1024 pipe size (512 bytes, -p) 8 POSIX message queues (bytes, -q) 819200 real-time priority (-r) 0 stack size (kbytes, -s) 8192 cpu time (seconds, -t) unlimited max user processes (-u) 3889 virtual memory (kbytes, -v) unlimited file locks (-x) unlimited |
The limit is given by the setting open files, in the above example 1,024. This is a common default on linux.
Ensure that the user that will run tomcat has a limit of at least 50,000, or is unlimited. Although Note that PhixFlow will generally open only a fraction of 50,000 file descriptors, however, it is best to ensure that this limit can never be reached, since otherwise numerous low level errors can occur.
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