Maximizing Performance and Scalability with IBM WebSphere
C
cache cleanup interval
setting for the EBJ container, 383 “384
cache size
setting in the EBJ container, 383
Call-by-Reference
setting in the Application Assembly Tool (AAT), 155
Call-by-Value
calling EJBs via, 155
capacity management
basic format of this approach, 506
Carrot model
showing correct queuing configuration, 280
cell
defined, 71
vs. WebSphere 4 domain, 70
cells
reducing management overhead associated with, 72
channel
defined, 173
checklist
for database-to-WebSphere implementation, 427 “428
choke tier
in a 3-tier firewall topology, 169 “170
CISC or x86 processors
cost of vs. RISC-based processors, 97
Cisco PIX firewalls
HSRP capabilities supported by, 353
ClawHammer. See AMD AthIon 64 (ClawHammer)
client tier API
in JDBC type 3 driver implementation, 425
CloneID directive
use of in WebSphere 4 and 5 plug-in files, 313
clones
function of in WebSphere 4, 66 “68
vs. server groups, 66 “67
cloning
extending load-balancing capability of WebSphere with, 67 “68
and workload management flowchart in WebSphere 4, 68
closed queuing model
function of, 279
cluster. See WebSphere cluster environment
ClusterAddress directive
code example showing use of, 321
forcing requests to an external load balancer with, 320 “322
clustered active-standby configuration example of, 221 “222
clustering
to achieve performance improvement, 293 “299
clustering systems
using other active-standby or IP takeover, 369 “370
clusterware
use of in active-standby databases, 220 “222
using to cluster components , 294 “295
clusterware solutions
well-known and WebSphere supported, 294 “295
CMP. See Container Managed Persistence (CMP)
code example
for declaring the ConnectTimeout setting and value, 322 “323
for handling database errors in application code, 361
of HTTP plug-in configuration file, 55 “56
for implementing MQ asynchronous transactions, 460 “461
of a JDBC URL configuration file, 367
for mapping WebSphere 4 dual instance Web container configuration, 314 “315
for mapping WebSphere 5 dual instance Web container configuration, 315 “316
of Oracle TNS names configuration file for Transparent Application Failover, 368
of Oracle TNS names configuration file for server failover, 366
for referencing an external or non-standard data type, 466
of server cluster directive, 314
of server group directive, 314
showing proper object closure in databases, 420 “421
showing use of ClusterAddress directive, 321
of WebSphere 4 HTTP plug-in configuration file, 311 “312
WebSphere 4 key CloneID changes, 316
of WebSphere 5 HTTP plug-in configuration file, 312
WebSphere 5 key CloneID changes, 316 “317
cold disaster recovery sites
typical configuration and function of, 301
COMM_FAILURE message, 339
Compaq/HP TruCluster
clustering solution, 295
comparison chart (CPU)
x86/IA-64/x86-64 platform (Intel and AMD), 90 “91
COMPLETE_STATUS message, 339
Complex Instruction Set Computing (CISC)-based processors vs. RISC-based UltraSPARC processors, 96
component architecture
WebSphere 4 and 5, 51 “79
component modeling
in multiple JVM environments, 185
components
reasons for splitting into their own tiers, 194 “195
concurrent and registered users
effect of on response times, 236
configuration and tuning parameters
for Oracle systems, 437 “438
configuration repository
function of in WebSphere 5, 77
configuration settings
use of administrative repository for in WebSphere 4, 68 “69
conn.close() command
closing the JDBC database connection with, 421
connection pool manager. See also WebSphere connection pool manager
provided by WebSphere, 215 “217
connection pool managers
closing connections in WebSphere applications with, 362
Connection Timeout
setting in WebSphere 4 and 5, 446 “447
Connection Timeout setting
in JDBC connection pool manager, 444
ConnectTime
setting in WebSphere 5, 332 “333
ConnectTimeout setting
in WebSphere 5, 322 “323
ConnectTimeout setting and value
code example for declaring, 322 “323
Container Managed Persistence (CMP)
in J2EE database integration, 414 “415
in multiple JVM environments, 186
Container Managed Persistence (CMP) vs. Bean Managed Persistence (BMP), 415 “416
container threading services
using instead of manually spawning threads, 402 “403
container-managed persistence (CMP)
using only for high-read database access, 408
containers
the EJB container, 374 “377
high-level application server framework view, 372
an overview, 371 “372
within WebSphere, 372
what they do, 373 “377
context switches
in vmstat output, 477
cookies
popular means of session management in WebSphere, 327 “328
CORBA
example implementation within a WebSphere platform, 457
example transaction with WebSphere, 458
having all components with a shared application server, 459 “460
key communications status messages, 338 “340
CORBA integration
platform and language independency of, 456
CORBA Object Request Broker (ORB) services
requests serviced by the application server, 59
CORBA.INTERNAL exception, 340
cost comparisons
for optimization vs. upgrade for pilot application, 17
cost impact factors
that help determine downtime costs, 45
CPU and overall server load
measuring in Windows, 481 “484
CPU and server comparison matrix
for selecting model for your needs, 104
CPU and system load
key load and performance identifiers in Unix, 475 “481
CPU comparison chart
x86/IA-64/x86-64 platform (Intel and AMD), 90 “91
CPUs
determining best for your needs, 105 “108
for development and desktop needs, 92 “93
for server and high-end server needs, 93
CPUs and servers
best for medium production environments, 106 “107
best for small production environments, 105 “106
Curl
command line tool for probing Internet services, 245
Curl/Perl/Lynx
software for custom building stress and volume testing suites, 246
customer administration application
in a single-channel 3-tier topology, 178 “180