Oracle 5.0 Reference Manual page 755

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Copying to tmp table
The server is copying to a temporary table in memory.
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Copying to tmp table on disk
The server is copying to a temporary table on disk. The temporary result set has become too large
(see Section 8.8.5, "How MySQL Uses Internal Temporary
changing the temporary table from in-memory to disk-based format to save memory.
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Creating index
The thread is processing
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Creating sort index
The thread is processing a
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creating table
The thread is creating a table. This includes creation of temporary tables.
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Creating tmp table
The thread is creating a temporary table in memory or on disk. If the table is created in memory
but later is converted to an on-disk table, the state during that operation will be
table on disk.
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deleting from main table
The server is executing the first part of a multiple-table delete. It is deleting only from the first table,
and saving columns and offsets to be used for deleting from the other (reference) tables.
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deleting from reference tables
The server is executing the second part of a multiple-table delete and deleting the matched rows
from the other tables.
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discard_or_import_tablespace
The thread is processing an
IMPORT TABLESPACE
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end
This occurs at the end but before the cleanup of
SELECT, or
UPDATE
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executing
The thread has begun executing a statement.
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Execution of init_command
The thread is executing statements in the value of the
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freeing items
The thread has executed a command. Some freeing of items done during this state involves the
query cache. This state is usually followed by
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Flushing tables
The thread is executing
General Thread States
ALTER TABLE ... ENABLE KEYS
that is resolved using an internal temporary table.
SELECT
ALTER TABLE ... DISCARD TABLESPACE
statement.
statements.
and is waiting for all threads to close their tables.
FLUSH TABLES
735
Tables"). Consequently, the thread is
for a
MyISAM
ALTER TABLE, CREATE
init_command
cleaning up.
table.
Copying to tmp
or
ALTER TABLE ...
VIEW, DELETE, INSERT,
system variable.