zabbix wait for 15s seconds 出现原因及调优建议

在监控设备的时候，在server端的日志中有时候会见到类似another network error, wait for 15s seconds的异常，今天我们看下这个问题的出现原因和解决方案:

问题定位到poller.c，看下下面两份代码:

这个get_values的部分代码:

for (i = 0; i < num; i++) { switch (errcodes[i]) { case SUCCEED: case NOTSUPPORTED: case AGENT_ERROR: if (HOST_AVAILABLE_TRUE != last_available) { zbx_activate_item_host(&items[i], &timespec); last_available = HOST_AVAILABLE_TRUE; } break; case NETWORK_ERROR: case GATEWAY_ERROR: case TIMEOUT_ERROR: if (HOST_AVAILABLE_FALSE != last_available) { zbx_deactivate_item_host(&items[i], &timespec, results[i].msg); last_available = HOST_AVAILABLE_FALSE; } break; case CONFIG_ERROR: /* nothing to do */ break; default: zbx_error("unknown response code returned: %d", errcodes[i]); THIS_SHOULD_NEVER_HAPPEN; }