GLOSSARY - The Data Access - page 313

idle connections
In the context of connection pooling, connections that are available for use in the con-
nection pool. See also active connections.
insensitive cursor
A type of scrollable cursor that ignores any data modifications that could impact the
result set of the cursor.
J-K
Java heap
A reserved pool of memory from which a JVM allocates memory for new Java objects.
See also heap size.
Just-in-Time (JIT) compiler
A code generator provided by some JVMs and the .NET Common Language Runtime
(CLR) that converts bytecode into native machine language instructions at runtime.
Code compiled with a JIT compiler typically runs faster than code that hasn't been com-
piled.
Kerberos
A network authentication protocol that was originally developed at MIT as a solution to
the security issues of open network computing environments. Kerberos is a trusted third-
party authentication service that verifies users' identities.
L
latency
The time delay it takes for a network packet to travel from one destination to another.
lazy fetching
A method of returning data used by some database drivers. The database driver returns
only as many result rows as necessary in as many network round trips to the database
server as necessary and caches the result set on the driver machine. If the next request for
a row is not in the cached result set, the driver makes the necessary number of round
trips to return more rows.
little endian
A byte order method used to store multibyte data, such as long integers, in memory.
Little endian machines store data in memory little-end first. The first byte is the smallest.
See also endianness and big endian.