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Using the Query Language 491
Using the Query Language in Rule Conditions or Derived Metric Expressions
rules to perform the same function (rate) on the same metric
(
#passivationCount#). Instead of doing this manually for each rule, you
decide to create a derived metric that you can use in all of these rules’ conditions.
You use the fields and controls on the Create Derived Metric dashboard (Data >
Create Derived Metric) to create a derived metric expression that calculates the
passivation rate for EJBs.
After launching the Expression Editor dialog box, you open the Function tab
and select rate from the Function Name box. You then specify the argument for
this function in the Arg1 field. For example, specify the passivation count as an
argument for this function by typing
#passivationCount# in the Arg1 field.
Then click Insert to insert the function. The function and its parameter appear in
the Condition field.
rate(#passivationCount#)
Using Functions with Conditions and Expressions
Derived metric expressions and rule conditions and expressions are matched against
monitoring data. vFoglight can perform functions on this data. Functions cause
calculations to be performed on the data specified in conditions and expressions,
allowing the data to be modified before it is matched.
Most of the default functions available with vFoglight cause calculations to be
performed on metrics. In addition, the functions
alarmCount, changeSummary,
descendents, findObservationEntries, getContainedObjects, and
getObservationTrend cause values to be returned for topology objects (based on a
specified scope). In most cases, you specify
scope as the parameter for one of these
functions; using the
scope variable causes the function to be performed on the topology
objects included in the rule or derived metric scope. However, there may be situations in
which you want to specify an alternate scope. See “Advanced scripting example” on
page 495 for more information.
The following functions are supported by vFoglight for use with rule conditions and
expressions and derived metric expressions:
•
alarmCount: Returns the current number of alarms for each topology object
referenced by this function’s
scope parameter.
•
avg: Calculates an average (arithmetic mean) from metric values.
If you are calculating an average for multiple topology objects, vFoglight will
calculate an average from the metric values for each object, then calculate a
second average from the averages for the objects.
- Table of Contents 3
- 4 vFoglight 4
- Table of Contents 5 5
- 6 vFoglight 6
- Table of Contents 7 7
- 8 vFoglight 8
- Introduction to this Guide 9
- About vFoglight 10
- About this Guide 10
- Core Documentation Set 12
- Cartridge Documentation Sets 13
- Feedback on the Documentation 13
- Text Conventions 14
- About Vizioncore Inc 14
- Introduction to this Guide 15 15
- Contacting Dell 16
- Guatemala 20
- Hong Kong 20
- Ireland (Cherrywood) 21
- Italy (Milan) 21
- Japan (Kawasaki) 22
- Korea (Seoul) 22
- Latin America 22
- Luxemborg 22
- U.K.(Bracknell) 26
- U.S.A. (Austin, Texas) 26
- U.S. Virgin Islands 27
- Venezuela 27
- Administration 32
- Setting Up vFoglight 53
- About vFoglight Setup 54
- Viewing Connection Status 54
- Setting Up vFoglight 55 55
- Federation 56
- Federation Configuration 58
- Database 59
- Mail (Global Settings) 61
- Port Name Default 65
- Description 65
- Managing Licenses 69
- Installing Licenses 70
- Viewing License Capabilities 72
- License capabilities 73
- Licensed cartridges 73
- Deleting Licenses 74
- Managing Support Bundles 75
- My support bundle 77
- Viewing Audit Information 82
- Filtering Audit Logs 87
- Viewing Log Entries 88
- Backing Up vFoglight 89
- Setting Up vFoglight 93 93
- tool. You can use 95
- Setting Up vFoglight 97 97
- Setting Up vFoglight 99 99
- Upgrading vFoglight 101
- Restoring vFoglight 102
- Managing Users and Security 105
- About Security in vFoglight 106
- Managing Users 107
- Creating Users 111
- Adding Users to Groups 112
- Groups” on page 122 113
- Changing Passwords 114
- Forcing Password Changes 115
- Unlocking Passwords 115
- This user is locked! 116
- Deleting Internal Users 117
- Managing Groups 118
- Foglight 120
- Creating Groups 122
- Editing Users in Groups 123
- Assigning Roles to a Group 124
- Deleting Internal Groups 126
- Managing Roles 127
- Dashboard 130
- Creating Roles 131
- Editing Groups for a Role 132
- Deleting Internal Roles 133
- Roles that you create 134
- Configuring Password Settings 135
- Editing Password Settings 137
- Changing Database Credentials 138
- Editing Directory Settings 142
- 146 vFoglight 146
- Managing Cartridges 147
- About vFoglight Cartridges 148
- Windows 153
- Installing Cartridges 155
- Enabling Cartridges 157
- Disabling Cartridges 158
- Uninstalling Cartridges 159
- Downloading Agent Components 161
- Downloading Components 163
- Managing Agents 165
- About vFoglight Agents 166
- List property 167
- Properties dashboard 168
- Primary properties 171
- Registry 183
- Managing Registry Variables 185
- Permission granted 188
- Permissions not assigned 188
- Permission denied 188
- Copying registry variables 191
- Deleting registry variables 193
- Creating Registry Variables 195
- Editing Registry Variables 200
- Specifying values 201
- Using performance calendars 204
- Viewing Registry Values 209
- Show/Hide columns 212
- System Administrators 217
- SYSADMIN variable 218
- 222 vFoglight 222
- Working with Rules 223
- Managing Rules 225
- Editing rule permissions 228
- Copying rules 231
- 232 vFoglight 232
- Deleting rules 233
- Disabling or enabling rules 234
- Suspending or resuming alarms 236
- Viewing rule schedules 240
- Viewing a rule summary 241
- Rule Summary bar 243
- Creating Rules 246
- Defining Rules 248
- Defining rule types 250
- Triggering rules 251
- Defining the rule scope 253
- Multiple-severity rule 255
- Simple rule 255
- Writing conditions 261
- 264 vFoglight 264
- 272 vFoglight 272
- Defining actions 278
- COMMAND_LINE 279
- Note If the command is not 289
- Defining Rule-Level Variables 303
- Core vFoglight Rules 305
- Core vFoglight rules 306
- Conditions State 307
- Instance 311
- Setting basic rule properties 312
- Scoping the rule 312
- Specifying conditions 313
- Processor scope 316
- Processor, that you 320
- Processor type 320
- #percentUserTime# > 0.9 321
- 326 vFoglight 326
- Working with Data 327
- Adding Topology Types 329
- Working with Derived Metrics 332
- Managing Derived Metrics 333
- Working with Data 337 337
- Copying derived metrics 339
- Deleting derived metrics 341
- Creating Derived Metrics 342
- Defining Derived Metrics 344
- Triggering derived metrics 348
- Setting the value type 350
- Multiple Derivations 352
- Working with Thresholds 353
- Editing threshold permissions 355
- Working with Data 357 357
- Deleting thresholds 359
- Creating Thresholds 361
- Defining Thresholds 362
- Managing Retention Policies 372
- About database generations 373
- Windows_System_Top_CPU_Table 380
- Deleting Retention Policies 381
- Editing Retention Policies 386
- Creating Retention Policies 388
- Working with Data 391 391
- Management Server 393
- 394 vFoglight 394
- Using Schedules 395
- About Schedules 396
- Managing Schedules 397
- Editing Schedule Permissions 399
- 400 vFoglight 400
- Copying Schedules 402
- Deleting Schedules 404
- Viewing Schedule Definitions 405
- Viewing and Editing Schedules 406
- Creating Schedules 407
- Schedule Items” on page 415 414
- Defining Schedule Items 415
- 4, and select the Monday and 431
- 3, as illustrated 437
- Using Schedules 441 441
- 6, as illustrated bellow 444
- About vFoglight Tooling 448
- Building Script Agents 448
- Looking at the Script Syntax 449
- MyScriptAgent-1.2.0 456
- MyAgent 459
- 460 vFoglight 460
- 462 vFoglight 462
- Example: Type 1 Script 466
- Example: Type 2 Script 466
- Selecting Topology Objects 469
- Host topology type 470
- Topology object ID 471
- Topology type 471
- Instance name 471
- Retrieving Data 472
- Using the Query Language 473
- Metric Scope 474
- Metric Expressions 480
- Inserting operators 482
- TopologyObject 485
- ExecuteTimeCritical 490
- Using the Query Language FAQ 495
- Appendix: vFoglight Client 497
- Reference 497
- Starting the vFoglight Client 498
- Browser Interface 501
- Command-Line Interface 503
- Reference Guide 504
- 508 vFoglight 508
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