Index_L

L

Last value

in Performance tool network utilization output, 496

lazy initialization

using in the WebSphere business tier , 403

LDAP environments

forms of clustering in, 345

high-availability implementation, 346

implementation and performance, 345 “347

LDAP farm

using LDAP master/replica techniques to configure, 346

LDAP server clustering

available for LDAP environments, 345

LDAP servers

options and considerations, 344 “345

supported by WebSphere, 344 “347

legacy integration. See legacy systems integration

legacy systems integration

design considerations for, 455 “472

example CORBA and WebSphere implementation, 457

example of, 454

performance optimization, 453 “472

via XML over SOAP or XML RPC, 455

what it is, 453 “455

legacy systems integration components

as part of a WebSphere queue, 280

level 3cache component

function of, 113

lightweight connections

teardown of vs. Remote Method Invocation (RMI) connections, 270 “271

Lightweight Directory Access Protocol (LDAP) server clustering, 294

Lightweight Processes (LWP)

function of, 259 “260

limp home modes

used by some load balancers, 354

Linux

disabling the TCP Selective Acknowledgment setting, 256

getting network interface statistics in, 491

and Lightweight Processes (LWP), 259 “260

optimization and tuning checklist for, 255 “260

Linux swap space command, 480

Linux TCP/IP stack

features that can impede performance, 255

optimization, 255

Linux-based WebSphere application server

deactivating the TCP Acknowledgment feature, 256

deactivating the TCP keepalive feature in, 256 “257

disabling the TCP time stamping feature, 256

increasing the amount of open files, 258 “259

increasing the socket buffer memory allocation, 257 “258

live production shakeout, 15

load average

defined, 476

load balancer

needed in front of Web HTTP servers, 303 “304

load balancers

as critical components of business systems, 352 “353

routing mechanism approach, 355

in WebSphere-based applications, 354 “356

load balancing

achieving redundancy with DNS round- robin configuration, 308 “309

using cloning to extend in WebSphere, 67

load balancing and firewall environment

other considerations for, 355 “356

load testing and profiling applications

for WebSphere application environments, 243 “244

LoadBalanceWeight directive

function of in failover configurations, 317 “318

LoadBalanceWeight setting

example of function of in WebSphere 5, 318 “320

LoadRunner, Mercury Interactive

stress and volume testing tool, 246

local network environment

main categories of within a WebSphere environment, 162 “164

log_buffer parameter

for Oracle system configuration and tuning, 437

Logbufsz parameter

setting in IBM DB2, 441

logical partitioning (LPAR)

in IBM PowerPC platform (pSeries), 147

Lotus Domino Enterprise Server

supported by WebSphere, 344

LPAR. See logical partitioning (LPAR)

LVD (Low Voltage Differential) SCSI

function of, 121 “122

LWPs (Lightweight Processes). See Lightweight Processes (LWP)

Lynx

command line Web browser, 245