Blue Coat Systems Blue Coat Systems SG Appliance Filtering the Display, About the Byte Totals

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Chapter 5: Statistics

About the Byte Totals

The client and server byte total is the sum of all bytes going to and from the client or server. All application-level bytes are counted, including application overhead such as HTTP headers, CIFS headers, and so on. TCP and IP headers, packet retransmissions, and duplicate packets are not counted.

The following sections describe some of the factors that can affect the byte totals.

ADN Tunnels

If the traffic is flowing through an ADN tunnel, the bytes are counted after ADN optimization, meaning that compressed byte counts are displayed.

Multiple Server Connections

A single client connection can use many server connections. The server byte counts include the total bytes transferred over all server connections accessed over the lifetime of a client connection. Even though a server connection can serve many clients, the same server byte is never included in more than one client connection total.

Aborted Downloads

In some cases, you might see the server bytes increasing even after the client has closed the connection. This can occur when a client requests a large object and aborts the download before receiving the entire object. The server bytes continue to increase because the SG appliance is retrieving the object for caching.

Explicit Proxying and Pipelining

If clients are explicitly proxied and the session has multiple connections or is pipelined, no client bytes are displayed and the expanded server connections display no gain when the tree view is shown. This is because the SG appliance is downloading the content before serving it to the client.

What Is Not Displayed

The Proxied Sessions page does not display statistics for:

❐IM (Yahoo, AOL, MSN), DNS, SOCKS, and Telnet

❐Inbound ADN connections

❐Bridged connections

❐Administrative connections (Management Console, SSH console, SNMP, DSAT, access-logging, Director, and so on)

❐Off-box processing connections (ICAP, DRTR, etc.)

Note: In some cases, an administrative or off-box connection might correspond to a specific client connection, for example, an ICAP AV scanning connection associated with a specific HTTP client connection. However, the byte counts collected from administrative or off-box connections are not included in the Active Sessions display.

Filtering the Display

Use the Filter drop-down list to filter the proxied session statistics.

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Contents Blue Coat Systems SG Appliance Contact Information Contents Diagnostics Appendix a Glossary Index Volume 9 Managing the Blue Coat SG Appliance Document Conventions About Managing the SG ApplianceVolume 9 Managing the Blue Coat SG Appliance Automatically Registering the SG Appliance with Director Using Director to Manage SG SystemsTo register the appliance with a Director Related CLI Commands for Director RegistrationDirector Registration Requirements Registering the SG Appliance with DirectorTo view the fingerprint of the key Setting up Director and SG Appliance CommunicationTo view the system summary statistics Monitoring the System and DisksSystem Summary To delete a keyTo view the system environment statistics Viewing System Environment SensorsTo view disk status or take a disk offline Viewing Disk StatusTo view SSL accelerator cards Setting Up Event Logging and NotificationConfiguring Which Events to Log Viewing SSL Accelerator Card InformationEnabling Event Notification Setting Event Log SizeRelated CLI Commands for Setting the Event Logging Level Related CLI Commands to Set the Event Log SizeSyslog Event Monitoring To enable event notificationsRelated CLI Commands to Enable Event Notifications Related CLI Commands to Enable Syslog Monitoring Viewing Event Log Configuration and ContentViewing the Event Log Configuration To enable syslog monitoringViewing the Event Log Contents Enabling Snmp Configuring SnmpTo enable and configure Snmp Related CLI Commands to Enable and Configure SnmpTo set or change community strings Configuring Snmp Community StringsRelated CLI Commands for Enabling Snmp Traps Configuring Snmp TrapsTo enable Snmp traps Health Monitoring Requirements Configuring Health MonitoringAbout Health Monitoring About the Health Monitoring Metric TypesAbout License Expiration Metrics Health Monitoring ExampleAbout the Licensing Metrics About Health Monitoring NotificationAbout the General Metrics Metric Threshold States and Corresponding Values About the Status MetricsTo change the threshold and notification properties Changing Threshold and Notification PropertiesGetting a Quick View of the SG Appliance Health To review the health monitoring statistics Viewing Health Monitoring StatisticsRelated CLI Syntax to View Health Monitoring Statistics TroubleshootingVolume 9 Managing the Blue Coat SG Appliance To restart the SG appliance Restarting the SG ApplianceHardware and Software Restart Options Restore-Defaults Restoring System DefaultsKeep-Console Factory-DefaultsTo clear the DNS cache To restore system defaultsClearing the DNS Cache Clearing the Object CacheUpgrading the SG Appliance Troubleshooting TipClearing the Byte Cache Clearing Trend StatisticsTo upgrade the SG appliance SG Appliance 5.x Version UpgradeRelated CLI Syntax to Upgrade the Sgos Software To view details for an Sgos system version To view Sgos system replacement optionsManaging SG Appliance Systems To set the SG appliance to run on the next hardware restart Setting the Default Boot SystemExample Session To unlock a system Locking and Unlocking SG Appliance SystemsReplacing an SG Appliance System To lock a systemTo delete a system Deleting an SG Appliance SystemDisk Reinitialization Multi-Disk SG AppliancesTo delete multiple objects from the SG appliance Single-Disk SG ApplianceDeleting Objects from the SG Appliance To delete a single object from the SG applianceDiagnostics To send service information automatically Diagnostic Reporting Service InformationSending Service Information Automatically To manage bandwidth for service information Managing the Bandwidth for Service InformationRelated CLI Syntax to Send Service Information To send service information Configure Service Information SettingsSGOS#diagnostics service-info subcommands To edit an existing snapshot job Creating and Editing Snapshot JobsTo create a new snapshot job Related CLI Syntax to Edit an Existing Snapshot Job Following subcommands are availableCommon Pcap Filter Expressions Packet Capturing the Job UtilityPcap File Name Format Using Filter Expressions in the CLI Configuring Packet CapturingTo enable, stop, and download packet captures Diagnostics Viewing Current Packet Capture Data Related CLI Syntax to Define Packet Capturing SettingsTo view current packet capture statistics To configure core image restart optionsCore Image Restart Options Uploading Packet Capture DataRelated CLI Syntax to Manage Heartbeats and Monitoring Diagnostic Reporting HeartbeatsTo set daily heartbeats and/or Blue Coat monitoring Related CLI Syntax to Configure and View CPU Monitoring Diagnostic Reporting CPU MonitoringTo configure and view CPU monitoring Volume 9 Managing the Blue Coat SG Appliance Selecting the Graph Scale StatisticsTraffic Mix Viewing Traffic Distribution StatisticsAbout Bypassed Bytes Understanding Chart DataRefreshing the Data To view bandwidth usage or gain statistics About the Default Service StatisticsViewing Bandwidth Usage or Gain To view client and server byte statistics Viewing Client Byte and Server Byte Traffic DistributionViewing Traffic History Supported Proxy Types and Services Unsupported Proxy Types To view client and server byte or bandwidth gain statistics Viewing the ADN HistoryViewing Bandwidth Management Statistics Viewing Protocol StatisticsSSL History To view CPU utilization Viewing System StatisticsResources Statistics Viewing CPU UtilizationTo view concurrent users Viewing Concurrent UsersTo view memory use statistics Viewing Disk Use StatisticsViewing Memory Use Statistics To view disk use statisticsTo view data allocation statistics Viewing Data Allocation Statistics in RAM and on DiskContents Statistics To view the event log Event Logging StatisticsTo view failover statistics Failover StatisticsActive Sessions-Viewing Per-Connection Statistics To view proxied sessions Analyzing Proxied SessionsViewing Proxied Sessions About the Proxied Sessions StatisticsProvided. See Viewing Sessions with Multiple Connections on Cache Hit Is unavailable if the content is non-cacheable or for Cifs Viewing Sessions with Multiple Connections Using the Tool TipsAbout MMS Streaming Connections MMS Understanding the Tree ViewAbout the Byte Totals What Is Not DisplayedFiltering the Display Analyzing Bypassed Connections Statistics Viewing Html and XML Views of Proxied Sessions DataTo view bypassed connections Viewing Bypassed ConnectionsAbout the Bypassed Connection Statistics 14. Filter Drop-Down List Viewing Health Check Statistics Viewing the Access LogViewing Html and XML Views of Bypassed Connections Data Viewing Health Monitoring StatisticsUsing the CLI show Command to View Statistics Statistics Volume 9 Managing the Blue Coat SG Appliance Appendix a Glossary URL Appendix a Glossary Drtr Icmp Volume 9 Managing the Blue Coat SG Appliance MACH5 MIB NTP 100 Network Tunneling tab 102 103 104 Index 106 Snmp 108
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