There are many other modules that support this basic functionality.

They can be accessed by clicking on the flowchart.

Another area of interest is the shared memory area, containing

table data/index blocks, locks, and backend information:

Another area of interest is the shared memory area, containing table

data/index blocks, locks, backend information, and lookup tables for

these structures:

<LI>ShmemIndex - lookupofshared memory addresses using structure names

<LI>ShmemIndex - lookup shared memory addresses using structure names

<LI><AHREF="../../include/storage/buf_internals.h">Buffer

Descriptors</A> - control header for buffer cache block

<LI><AHREF="../../include/storage/buf_internals.h">Buffer Blocks</A> -

<LI><AHREF="../../include/storage/lock.h">LockTable (ctl)</A> - lock table

structure, specifiying table, lock types, and backends holding or

waiting on lock

<LI>LockTable (lock hash) - lookup of LockTable structures using relation

anddatabase object ids

<LI>LockTable (lock hash) - lookup of LockTable structures using relation,

database object ids

<LI>LockTable (xid hash) - lookup of LockTable structures using

transaction id

transaction id, LockTable address

<LI><AHREF="../../include/storage/proc.h">Proc Header</A> - information

about each backend, including locks held/waiting, indexed by process id