I've tried multiple configuration for odoo confi file but no luck in downloading the full db (2.6gb)

Any sugestion or ideas on how to configure odoo to not close the connection at 1.3 gb?

Server config: 

CPU: 16 cores

Ram: 54 GB

I've tried with all varions for memory, cpu and max cron 

017-02-10 13:45:10,348 7315 INFO ? openerp.sql_db: ConnectionPool(used=0/count=0/max=64): Closed 1 connections to 'dbname=neozidb_backup user=odoo password=xxxxxxxxxxxxxxxxx'

ODoo config:

admin_passwd = ********csv_internal_sep = ,data_dir = /opt/odoo/.local/share/Odoo;data_dir = /opt/odoosharedb_host = Falsedb_maxconn = 64db_name = Falsedb_password = **********db_port = Falsedb_template = template1db_user = odoodbfilter = .*debug_mode = Falsedemo = {}dev_mode = Falseemail_from = Falsegeoip_database = /usr/share/GeoIP/GeoLiteCity.datimport_partial =lang = en_USlimit_memory_hard = 6000000000limit_memory_soft = 6942177280limit_request = 8192limit_time_cpu = 10800limit_time_real = 14400list_db = Truelog_db = Falselog_db_level = warninglog_handler = :DEBUGlog_level = debuglogfile = /var/log/odoo/odoo-server.loglogrotate = Truelongpolling_port = 8072max_cron_threads = 3osv_memory_age_limit = 12.0osv_memory_count_limit = Falsepg_path = Nonepidfile = Noneproxy_mode = Truereportgz = False;server_wide_modules = Nonesmtp_password = Falsesmtp_port = 25smtp_server = localhostsmtp_ssl = Falsesmtp_user = Falsesyslog = Falsetest_commit = Falsetest_enable = Falsetest_file = Falsetest_report_directory = Falsetranslate_modules = ['all']unaccent = Falsewithout_demo = Falseworkers = 17xmlrpc = Truexmlrpc_port = 8069xmlrpc_interface =netrpc_port = 8070netrpc_interface =