Increase in mysql Open_files_limit

Good afternoon everyone ... as the open thread says, some of you have been forced to increase this parameter to make a dump of a very large database ....

Server version: 5.5.54-0 + deb8u1 (Debian)

It would be good any help, to be able to skip this limitation .. I have already tried all the forums that I have read and changed ... but I did not manage to increase the paramenter to copy a database

Good morning Bene ... thank you very much for your interest, sorry the delay was outside, enjoying a little summer with the family

Sorry for my english ... I only use a google translate.

I have tried several things reading some forums but none of them have been effective in order to expand the 2000 that I need
I have changed values

Ulimit -n 10000

I have changed values in

/etc/security/limits.conf

I have modified values on mysql in your configuration file forcing the new values on the parameter

Open-files-limit = 2000

But I have not been able to get all the data at once .., so far I have worked with workbench to get sql ...
But with the script that makes our backup in the panel does not leave the whole copy,
More or less is a small summary

output --- >

mysql> SHOW GLOBAL STATUS LIKE 'Open_files';
+---------------+-------+
| Variable_name | Value |
+---------------+-------+
| Open_files | 442 |
+---------------+-------+
1 row in set (0.00 sec)

mysql> SHOW VARIABLES LIKE 'Open_files_limit';
+------------------+-------+
| Variable_name | Value |
+------------------+-------+
| open_files_limit | 1024 |
+------------------+-------+
1 row in set (0.00 sec)