Observability
Monitor current statistics
On this page
To display current statistics, click the Stats tab.
Tip
You can also monitor load balancer metrics using the Statistics dashboard.
Backends and servers Jump to heading
The Server Farms section shows statistics for the backends and backend servers configured on the LB Layer7 tab.
The following operations are available.
| Operation | Description |
|---|---|
| config | Open the LB Layer7 tab and scroll the configuration file to the backend section. |
| monitor | Open the Monitoring tab. |
| details | Display the detail table showing statistics for each backend and server. See below for descriptions. |
| refresh | Update the displayed statistics. |
Detail table Jump to heading
The following statistics are shown for each backend and server.
| Statistic | Description |
|---|---|
| Status Cur | Server or backend status: - UP: Server reporting as healthy. - DOWN: Server reporting as unhealthy and unable to receive requests. - NOLB: You have added http-check disable-on-404 to the backend, and the health-checked URL has returned an HTTP 404 response. - MAINT: The server has been disabled or put into maintenance mode. - DRAIN: The server has been put into drain mode. - no check: Health checks are not enabled for this server. |
| Status Change | Elapsed time since the last status change. |
| Downtime Check | Health check failures counter. |
| Downtime Count | DOWN status counter. |
| Downtime Time | DOWN status elapsed time. |
| Servers Weight | Proportion of traffic this server is configured to accept, based on the weight parameter. The backend row shows the number of connected servers versus total servers. |
| Servers Active | Indicates whether server is functioning as an active server (Yes) or a backup server (No). The backend row shows the number of connected active servers versus total active servers. |
| Servers Backup | Indicates whether server is functioning as a backup server (Yes) or an active server (No). The backend row shows the number of connected backup servers versus total backup servers. |
| Connections Cur | Number of concurrent connections/sessions. |
| Connections Max | Highest number of connections/sessions that have ever been established simultaneously. |
| Connections Limit | Maximum number of simultaneous connections/sessions allowed as determined by the maxconn setting on each server line or, for the backend row, either the value of fullconn or the total of the limit values of the frontends that route to this backend divided by 10. For example, if two frontends route to this backend, and the total of their limit values is 4000, the connection limit is 400. |
| Connections Cumul | Cumulative number of connections. |
| Connections LoadB | The total number of times the given server was selected to serve a request. This can be due to normal load balancing or because of a redispatch from a failed server. The backend row shows the total for all servers in the backend. |
| Queued Cur | Number of client connections waiting to be assigned to a server. |
| Queued Max | Highest number of clients that have ever been queued simultaneously. |
| Queued Limit | Maximum number of connections that are allowed to be queued, as defined by the maxqueue setting on each server line… |
| Denied Req | Number of requests deemed security threats and rejected using one of the following directives: - http-request deny - http-request reject - http-request silent-drop - http-request tarpit - http-response silent-drop - tcp-request content reject - tcp-request content silent-drop - tcp-response content silent-drop |
| Denied Resp | Number of requests deemed security threats and rejected using the http-response deny or tcp-response content reject directive. |
| Errors Conn | Number of requests that encountered an error while trying to connect to the server. |
| Errors Resp | Number of errors encountered while getting the response. |
| Warnings Retry | Connection retry counter (when backend configured with retries). |
| Warnings Redis | Number of redispatched connections (when backend configured with option redispatch). |
| Conn/s Cur | Rate at which connections are being made to a server. |
| Conn/s Max | Highest rate at which connections have ever been established to the given server. |
| L7 status code Success | HTTP 1xx, 2xx, and 3xx code counter. Hover over the value to see the breakdown for each class of codes. |
| L7 status code Errors | HTTP 4xx, 5xx, and other code counter. Hover over the value to see the breakdown for each class of codes. |
| L7 status code An. fail | Non-HTTP error counter. |
| Data abort Client | Number of times a client disconnects in DATA phase. |
| Data abort Server | Number of times a server disconnects in DATA phase. |
| Bytes In | The amount of data sent by the load balancer to the upstream server. The backend row shows the total for all servers. |
| Bytes Out | The amount of data received by the load balancer from the upstream server. The backend row shows the total for all servers. |
Frontends Jump to heading
The Virtual Services section shows statistics for the frontends configured on the LB Layer7 tab.
The following operations are available.
| Operation | Description |
|---|---|
| config | Open the LB Layer7 tab and scroll the configuration file to the frontend section. |
| monitor | Open the Monitoring tab. |
| details | Display the detail table showing statistics for each frontend. See below for descriptions. |
| refresh | Update the displayed statistics. |
Detail table Jump to heading
The following statistics are shown for each frontend.
| Statistic | Description |
|---|---|
| Status Cur | Frontend status. When OPEN, the frontend is operating normally and ready to receive traffic. When you disable the frontend, the status becomes STOP. |
| Connections Cur | Number of concurrent fully established connections/sessions. |
| Connections Max | Highest number of fully-established connections/sessions that have ever been in use simultaneously. |
| Connections Limit | Maximum number of simultaneous fully-established connections/sessions allowed. |
| Connections Cumul | Cumulative number of fully established connections. |
| Denied Req | Number of requests deemed security threats and rejected using one of the following directives: - http-request deny - http-request reject - http-request silent-drop - http-request tarpit - http-response silent-drop - tcp-request connection silent-drop - tcp-request content reject - tcp-request content silent-drop |
| Denied Resp | Number of requests deemed security threats and rejected using the http-response deny directive. |
| Errors Req | The number of requests that have encountered an error. Possible causes include: - early termination from the client - a read error from the client - the client timed out - the client closed the connection - the client sent a malformed request - the request was tar pitted |
| Conn/s Cur | The rate at which clients are connecting to the load balancer (not yet fully established as sessions). |
| Conn/s Max | The highest number of non-fully-established connections that have ever been in use simultaneously. |
| Conn/s Limit | Maximum number of non-fully-established connections per second allowed. |
| Requests Cumul | Total number of HTTP requests received. |
| Req/s Cur | Rate at which HTTP requests are being received over established connections. |
| Req/s Max | Highest rate at which HTTP requests have been received over established connections. |
| L7 status code Success | HTTP 1xx, 2xx, and 3xx code counter. Hover over the value to see the breakdown for each class of codes. |
| L7 status code Errors | HTTP 4xx, 5xx, and other code counter. Hover over the value to see the breakdown for each class of codes. |
| Bytes In | Cumulative amount of data received by load balancer from downstream clients. |
| Bytes Out | Cumulative amount of data sent by load balancer to downstream clients. |
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