Sorry for my bad english.
I have a problem with network graphs.There is one frontend we have.Until it has less then 80M traffic on interfaces it keeps drawing the graph.
After it reaches it it draws nothing.No errors in log until traffic is 80M.After reaching this values errors apper:
07/02/2012 04:22:33 PM - CMDPHP: Poller[0] ERROR: A DB Exec Failed!, Error:'2006', SQL:"insert into poller_output (local_data_id, rrd_name, time, output) values (1757, 'traffic_in', '2012-07-02 16:05:01', '5250241086898')'
07/02/2012 04:22:33 PM - CMDPHP: Poller[0] ERROR: A DB Exec Failed!, Error:'2006', SQL:"insert into poller_output (local_data_id, rrd_name, time, output) values (1756, 'traffic_out', '2012-07-02 16:05:01', '4745285687468')' .
And then at night when traffic minimal ,errors dissaper and graph start drawing normally back.I just don't know where to dig else.
Cacti version:0.8.8a
SNMP Version:NET-SNMP version: 5.3.2.2
RRDTool Version RRDTool 1.4.x
Hosts 24
Graphs 902
Poller settings(cmd.php) :
Concurrent Processes 32
Max Threads 1
PHP Servers 10
Script Timeout 250
Max OID 30
System:CentoOS x86_64 5.8(Final)
php.ini:
max_execution_time = 600
max_input_time = 600
memory_limit = 1024M
mysql percona version:Percona 5.1.63
my.cnf:
symbolic-links=0
max_connections=400
log-slow-queries
slow_query_log_file=/var/log/mysql-slow.log
skip-name-resolve
wait_timeout=600
connect_timeout=300
max_allowed_packet=128M
tmp_table_size=128M
max_heap_table_size=128M
query_cache_limit=1G
innodb_flush_method=O_DIRECT
table_cache=2048
thread_cache_size=16
key_buffer_size=1G
P.S:snmp community: v2,graph was created with 64 bit counters.
Screenshot of graph:

Any help would be appreciated.