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:
-
ShmemIndex - lookup of shared memory addresses using structure names
+
ShmemIndex - lookup shared memory addresses using structure names
Descriptors - control header for buffer cache block
structure, specifiying table, lock types, and backends holding or
waiting on lock
-
LockTable (lock hash) - lookup of LockTable structures using relation
-and database object ids
+
LockTable (lock hash) - lookup of LockTable structures using relation,
+database object ids
LockTable (xid hash) - lookup of LockTable structures using
-transaction id
+transaction id, LockTable address
about each backend, including locks held/waiting, indexed by process id