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Foglight Experience Monitor 5.8.1 - Metric Reference Guide

Foglight Experience Monitor metric categories
General metric categories Application-oriented categories Service-oriented categories Web services category Content-oriented categories Infrastructure-oriented categories Types of metrics How standard metrics are calculated End-User Access Speed Network Latency Instrumented metric: Load Time Time frames in which metrics are viewed
Metric definitions
Non-system category metrics
Access Speed Access Speed Distribution Alarm Application Time Cipher Suite Not Found City Clicks per Session Client IP Command Byte Volume - Server Command Byte Volume - User Command Client Time Command Completion Time Command Count Command Data Size - Server Command Data Size - User Command Initial Response Time Command Initial Response Time Distribution Command Network Latency Command Processing Time Command Processing Time Percentile Command Processing Time Service Level Command Timeout Count Component List Size Connection Closed Count Connection Count Connection Duration Connection Established Count Connection Open Wait Count Connection Reset Count Connection Timeout Count Duration End-to-End Time for Dialup Users (0-56k) End-to-End Time for ISDN Users (56k-128k) End-to-End Time for Low-End Broadband Users (128k-384k) End-to-End Time for High-End Broadband Users (384k-728k) End-to-End Time for T1/Lan Users (> 728k) End-to-End Time Service Level Error Count (HTTP 4xx Client Errors) Error Count (HTTP 5xx Server Errors) Fault Actor Fault Code Fault Detail Fault String Fault Subcodes Field Out of Range Hit Count Hit End-To-End Time Hit Redirect Ratio Hit Size Incomplete SSL Key Invalid SSL Content Invalid SSL Handshake Type Invalid SSL Key Invalid SSL Record Length Invalid SSL State Invalid SSL Version Number IP Packet Byte Volume - Server IP Packet Byte Volume - User IP Packet Count - Server IP Packet Count - User IP Packet Size - Server IP Packet Size - User ISP Load Time Load Time Percentile Login Name Missing Reusable Secret Missing SSL Key Other Requests Page Access Speed Distribution Page Client Time Page Connection Count Page Download Attempts Page Download Size Page Element Count Page End-to-End Time Page End-To-End Time Distribution Page End-To-End Time Percentile Page Exit Count Page Network Latency Page Peak Count per Second Page Processing Time Page Processing Time Distribution Page Processing Time Percentile Page Redirect Ratio Page Stop Count Page Stop Rate Page Stop Time Page Think Time Page Timeout Count Page Views Path Count Path Duration Path End-To-End Time Path End-to-End Time Percentile Processing Load Percentage Processing Time Service Level Referrer Request Code Count Response Code Count Service Abort Count Service Client Time Service Count Service Duration Service End-to-End Time Service End-to-End Time Distribution Service End-to-End Time Percentile Service Network Latency Service Peak Count per Second Service Processing Load Percentage Service Processing Time Service Processing Time Distribution Service Processing Time Percentile Service Processing Time Service Level Service Request Count per Second Service Started Count Service Think Time Service Timeout Count Session Count Session Key Site Stickiness SOAP Operation Client Time SOAP Operation Completion Time SOAP Operation Completion Time Distribution SOAP Operation Consumer Overhead Ratio SOAP Operation Count SOAP Operation End-To-End Time SOAP Operation End-to-End Time Distribution SOAP Operation End-to-End Time Percentile SOAP Operation Failure Count SOAP Operation Initial Response Time SOAP Operation Network Latency SOAP Operation Peak Count per Second SOAP Operation Processing Time SOAP Operation Processing Time Distribution SOAP Operation Processing Time Percentile SOAP Operation Provider Overhead Ratio SOAP Operation Success Count SOAP Operation Success Ratio SOAP Operation Think Time SOAP Operation Timeout Count SOAP Transaction Abort Count SOAP Transaction Client Time SOAP Transaction Completion Time SOAP Transaction Completion Time Distribution SOAP Transaction Count SOAP Transaction Duration SOAP Transaction End-to-End Time SOAP Transaction End-to-End Time Distribution SOAP Transaction End-to-End Time Percentile SOAP Transaction Initial Response Time SOAP Transaction Network Latency SOAP Transaction Peak Count per Second SOAP Transaction Processing Time SOAP Transaction Processing Time Distribution SOAP Transaction Processing Time Percentile SOAP Transaction Processing Time Service Level SOAP Transaction Request Peak Count per Second SOAP Transaction Think Time SOAP Transaction Timeout Count SSL Memory Error Step Started Count Step Completion Count Step Abort Count Step Timeout Count Subnet Success Ratio Success Ratio (with Client Errors) Success Ratio (with Server Errors) TCP Command Client Time TCP Command Completion Time TCP Command Count TCP Command Initial Response Time TCP Command Initial Response Time Percentile TCP Command Network Latency TCP Command Processing Time TCP Connection Open Peak Count per Second TCP Queue Size TCP Control Segment Byte Volume - Client TCP Control Segment Byte Volume - Server TCP Control Segment Count - Client TCP Control Segment Count - Server TCP Control Segment Size - Client TCP Control Segment Size - Server TCP Data Segment Byte Volume - Client TCP Data Segment Byte Volume - Server TCP Data Segment Count - Client TCP Data Segment Count - Server TCP Data Segment Size - Client TCP Data Segment Size - Server TCP Duplicate Resend Segment Byte Volume - Client TCP Duplicate Resend Segment Byte Volume - Server TCP Duplicate Resend Segment Count - Client TCP Duplicate Resend Segment Count - Server TCP Duplicate Resend Segment Size - Client TCP Duplicate Resend Segment Size - Server TCP Fragmented Segment Byte Volume - Client TCP Fragmented Segment Byte Volume - Server TCP Fragmented Segment Size - Client TCP Fragmented Segment Size - Server TCP Fragmented Segment Count - Client TCP Fragmented Segment Count - Server TCP Invalid Checksum Segment Byte Volume - Client TCP Invalid Checksum Segment Byte Volume - Server TCP Invalid Checksum Segment Size - Client TCP Invalid Checksum Segment Size - Server TCP Invalid Checksum Segment Count - Client TCP Invalid Checksum Segment Count - Server TCP Payload Byte Volume - Client TCP Payload Byte Volume - Server TCP Resend Segment Byte Volume - Client TCP Resend Segment Byte Volume - Server TCP Resend Segment Count - Client TCP Resend Segment Count - Server TCP Resend Segment Size - Client TCP Resend Segment Size - Server TCP Segment Byte Volume - Client TCP Segment Byte Volume - Server TCP Segment Count - Client TCP Segment Count - Server TCP Segment Size - Client TCP Segment Size - Server TCP Timeout Count - Syn TCP Timeout Count - Idle TCP Timeout Count - Half Open TCP Urgent Segment Byte Volume - Client TCP Urgent Segment Byte Volume - Server TCP Urgent Segment Count - Client TCP Urgent Segment Count - Server TCP Urgent Segment Size - Client TCP Urgent Segment Size - Server Unexpected Client Hello Message Unexpected Server Hello Message Unknown Key Exchange Unload Time Unload Time Percentile User Agent User Count User Stickiness
System category metrics
Agent Memory Consumption Warnings Agent Restarts Baseline Partition Size Backup Errors Checksum Errors Client Segments Count Client Segments Missing Client Segments Missing Rate Communication Errors Connection Errors Connections Started Connections Dropped CPU1 Temperature CPU2 Temperature CPU Core 1 Utilization CPU Core 2 Utilization CPU Core 3 Utilization CPU Core 4 Utilization CPU Core 5 Utilization CPU Core 6 Utilization CPU Core 7 Utilization CPU Core 8 Utilization CPU Utilization Database Load Errors Database Load Time Database Partition Usage Database Records Loaded Datastore Inode Usage Datastore Partition Usage Day Partition Size Excessive Data Volume FxV Bytes Transmitted FxV Discards FxV Hits Transmitted Hour Partition Size Log Partition Usage Memory Consumption Warnings Memory Utilization Metric Table Entries Metric Table Size Minute Partition Size Monthly Partition Size OS Partition Usage Packet Drop Rate Packet Errors Packet Errors - Port 1 Packet Errors - Port 2 Packet Errors - Port 3 Packet Errors - Port 4 Packet Errors - Port 5 Packet Errors - Port 6 Packet Errors - Port 7 Packet Errors - Port 8 Packets Captured Packets Captured – Port 1 Packets Captured – Port 2 Packets Captured – Port 3 Packets Captured – Port 4 Packets Captured – Port 5 Packets Captured – Port 6 Packets Captured – Port 7 Packets Captured – Port 8 Packets Dropped Packets Dropped – Port 1 Packets Dropped – Port 2 Packets Dropped – Port 3 Packets Dropped – Port 4 Packets Dropped – Port 5 Packets Dropped – Port 6 Packets Dropped – Port 7 Packets Dropped – Port 8 Packets Processed Packets Processed – Port 1 Packets Processed – Port 2 Packets Processed – Port 3 Packets Processed – Port 4 Packets Processed – Port 5 Packets Processed – Port 6 Packets Processed – Port 7 Packets Processed – Port 8 RAID Array Degraded Relation Table Entries Relation Table Size Resource Table Entries Resource Table Size SiteMinder Errors Server Segments Count Server Segments Missing Server Segments Missing Rate SOAP Error Rate SOAP Errors SOAP Message Count SOAP XML Errors SSL Connection Errors SSL Connections Released SSL Connections Started SSL Connection Error Rate Swap Partition Usage System Temperature Tmp Partition Usage Total Table Size Value Count Table Entries Value Count Table Size Weekly Partition Size

Command Data Size - User

Application Component, Application Component by City, Application Component by Country, Application Component by ISP, Application Component by Region, Application Component by Subnet, City, Content Type, Country, Enterprise, Hit, HTTP Protocol, ISP, Page, Region, Server, Site, SOAP Consumer, SOAP Operation, SOAP Server, SOAP Web Service, SOAP Transaction, SOAP Transaction Step, Subnet, Service, Service Step, Service Step by City, Service Step by Country, Service Step by ISP, Service Step by Region, Service Step by Subnet, Service by City, Service by Country, Service by ISP, Service by Region, Service by Subnet, User Session

Count Metric

RequestData

This metric shows the average size of application messages sent from the user to the server. The message size only includes the application bytes, both IP and TCP headers sizes are excluded from the metric. The application bytes include the HTTP header and content.

If the message spans multiple packets, it is possible that one or more of the packets is resent due to packet drops or checksum errors. In this case, the duplicate application bytes are not included in the message size.

Application messages are reconstructed from a sequence of TCP/IP packets sent from the user to the server. TCP/IP packets are ordered and error checked to reconstruct the unique application data stream. Duplicate or invalid data is excluded from this data stream. From the application data stream, the start and stop of each application message is identified. The length of the application message is then determined from the start and stop of the message.

Command Data Size - Server

Command Initial Response Time

Application Component, Application Component by City, Application Component by Country, Application Component by ISP, Application Component by Region, Application Component by Subnet, City, Content Type, Country, Enterprise, Hit, HTTP Protocol, ISP, Region, Server, Site, Subnet, User Agent, User Session

Standard Metric

CommandInitialResponseTime

This metric reflects the time required to process the HTTP request, build a response and begin the initial transmission of the response. This metric does not include any network delays or client-side processing delays.

Some commands include a request but not a response due to the user halting the command (with a TCP Reset) or due to the server being overloaded. For these commands, the command response time is undefined and is not included in the mean, minimum, maximum, or standard deviation statistics.

This metric is calculated by measuring the delta time between when the last packet of the request reaches the server until the first packet of the response is sent by the server. This calculation assumes that the server does not begin processing the request until all parts of the request are received (last request packet).

Command Initial Response Time Distribution

Application Component, Application Component by City, Application Component by Country, Application Component by ISP, Application Component by Region, Application Component by Subnet, Enterprise, HTTP Protocol, Server, Site

Distribution

CommandInitialResponseTimeDist

This metric shows the distribution of command response times. You can configure the buckets that are used for the distribution. Distribution buckets and ranges are configurable (for more information, see “Distributing report sets” in the Foglight Experience Monitor User Guide.

A Command Initial Response Time is calculated for every command that contains a request and a response. For each of these commands, this metric is used to increment the counter for the appropriate bucket that is used for the response times.

Command Network Latency

Application Component, Application Component by City, Application Component by Country, Application Component by ISP, Application Component by Region, Application Component by Subnet, City, Content Type, Country, Enterprise, Hit, HTTP Protocol, ISP, Page, Region, Server, Site, Subnet, User Agent, User Session

Standard Metric

CommandNetworkLatency

Network latency is the time required for a packet, from the server, to traverse the network to the client (or vice versa). The agent analyzes network traffic utilizing characteristics of the TCP protocol stack to estimate this metric.

In the web console, on the Configure > URLs > Advanced Options page, the “Ignore delayed ACKs in network latency metric calculations” option causes the system to exclude delayed ACKs (TCP acknowledgements) from the calculations for this metric. This has the benefit of providing more accurate latency metrics, but can also cause the value for this metric to sometimes be reported as zero. WIth this option enabled, only immediate client ACKs are used in the calculations for this metric. These immediate ACKs are only mandatory if the client receives more than a single data packet from the server. If the message payload fits entirely into a single packet, the client is not required to send the immediate ACK. Consequently, the value reported for this metric can be zero if there were no immediate ACKs observed within the reporting time period.

In the web console, on the Configure > URLs > Advanced Options page, the “Use unweighted samples for network latency metric calculation” option causes the system to use an unweighted formula for this metric calculation. The unweighted formula is essentially a running total of all latency measurements that have occurred so far in the TCP connection, divided by the number of measurements. This is a direct average of all latency measurements in the TCP connection, unlike the “smoothed” latency measurement described in the Calculation section.

In a TCP connection, each packet that contains data must be acknowledged by means of another packet (ACK packet) from the receiving side. By measuring the delay from when a data packet is sent until the ACK is received, a passive monitor can calculate a round-trip time:

Because round-trip times can vary throughout the life of a TCP connection, the samples for the round-trip time are averaged into a smoothed round-trip time (SRTT) estimate.

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