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mariadb/mysql-test/suite/innodb/r/innodb_status_variables.result
Marko Mäkelä f27e9c8947 MDEV-29694 Remove the InnoDB change buffer 
The purpose of the change buffer was to reduce random disk access,
which could be useful on rotational storage, but maybe less so on
solid-state storage.
When we wished to
(1) insert a record into a non-unique secondary index,
(2) delete-mark a secondary index record,
(3) delete a secondary index record as part of purge (but not ROLLBACK),
and the B-tree leaf page where the record belongs to is not in the buffer
pool, we inserted a record into the change buffer B-tree, indexed by
the page identifier. When the page was eventually read into the buffer
pool, we looked up the change buffer B-tree for any modifications to the
page, applied these upon the completion of the read operation. This
was called the insert buffer merge.

We remove the change buffer, because it has been the source of
various hard-to-reproduce corruption bugs, including those fixed in
commit 5b9ee8d819 and
commit 165564d3c3 but not limited to them.

A downgrade will fail with a clear message starting with
commit db14eb16f9 (MDEV-30106).

buf_page_t::state: Merge IBUF_EXIST to UNFIXED and
WRITE_FIX_IBUF to WRITE_FIX.

buf_pool_t::watch[]: Remove.

trx_t: Move isolation_level, check_foreigns, check_unique_secondary,
bulk_insert into the same bit-field. The only purpose of
trx_t::check_unique_secondary is to enable bulk insert into an
empty table. It no longer enables insert buffering for UNIQUE INDEX.

btr_cur_t::thr: Remove. This field was originally needed for change
buffering. Later, its use was extended to cover SPATIAL INDEX.
Much of the time, rtr_info::thr holds this field. When it does not,
we will add parameters to SPATIAL INDEX specific functions.

ibuf_upgrade_needed(): Check if the change buffer needs to be updated.

ibuf_upgrade(): Merge and upgrade the change buffer after all redo log
has been applied. Free any pages consumed by the change buffer, and
zero out the change buffer root page to mark the upgrade completed,
and to prevent a downgrade to an earlier version.

dict_load_tablespaces(): Renamed from
dict_check_tablespaces_and_store_max_id(). This needs to be invoked
before ibuf_upgrade().

btr_cur_open_at_rnd_pos(): Specialize for use in persistent statistics.
The change buffer merge does not need this function anymore.

btr_page_alloc(): Renamed from btr_page_alloc_low(). We no longer
allocate any change buffer pages.

btr_cur_open_at_rnd_pos(): Specialize for use in persistent statistics.
The change buffer merge does not need this function anymore.

row_search_index_entry(), btr_lift_page_up(): Add a parameter thr
for the SPATIAL INDEX case.

rtr_page_split_and_insert(): Specialized from btr_page_split_and_insert().

rtr_root_raise_and_insert(): Specialized from btr_root_raise_and_insert().

Note: The support for upgrading from the MySQL 3.23 or MySQL 4.0
change buffer format that predates the MySQL 4.1 introduction of
the option innodb_file_per_table was removed in MySQL 5.6.5
as part of mysql/mysql-server@69b6241a79
and MariaDB 10.0.11 as part of 1d0f70c2f8.

In the tests innodb.log_upgrade and innodb.log_corruption, we create
valid (upgraded) change buffer pages.

Tested by: Matthias Leich
2023-01-11 17:59:36 +02:00

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SELECT variable_name FROM information_schema.global_status
WHERE variable_name LIKE 'INNODB_%'
AND variable_name NOT IN
('INNODB_ADAPTIVE_HASH_HASH_SEARCHES','INNODB_ADAPTIVE_HASH_NON_HASH_SEARCHES',
'INNODB_MEM_ADAPTIVE_HASH',
'INNODB_BUFFERED_AIO_SUBMITTED','INNODB_BUFFER_POOL_PAGES_LATCHED');
variable_name
INNODB_BACKGROUND_LOG_SYNC
INNODB_BUFFER_POOL_DUMP_STATUS
INNODB_BUFFER_POOL_LOAD_STATUS
INNODB_BUFFER_POOL_RESIZE_STATUS
INNODB_BUFFER_POOL_LOAD_INCOMPLETE
INNODB_BUFFER_POOL_PAGES_DATA
INNODB_BUFFER_POOL_BYTES_DATA
INNODB_BUFFER_POOL_PAGES_DIRTY
INNODB_BUFFER_POOL_BYTES_DIRTY
INNODB_BUFFER_POOL_PAGES_FLUSHED
INNODB_BUFFER_POOL_PAGES_FREE
INNODB_BUFFER_POOL_PAGES_MADE_NOT_YOUNG
INNODB_BUFFER_POOL_PAGES_MADE_YOUNG
INNODB_BUFFER_POOL_PAGES_MISC
INNODB_BUFFER_POOL_PAGES_OLD
INNODB_BUFFER_POOL_PAGES_TOTAL
INNODB_BUFFER_POOL_PAGES_LRU_FLUSHED
INNODB_BUFFER_POOL_PAGES_LRU_FREED
INNODB_BUFFER_POOL_READ_AHEAD_RND
INNODB_BUFFER_POOL_READ_AHEAD
INNODB_BUFFER_POOL_READ_AHEAD_EVICTED
INNODB_BUFFER_POOL_READ_REQUESTS
INNODB_BUFFER_POOL_READS
INNODB_BUFFER_POOL_WAIT_FREE
INNODB_BUFFER_POOL_WRITE_REQUESTS
INNODB_CHECKPOINT_AGE
INNODB_CHECKPOINT_MAX_AGE
INNODB_DATA_FSYNCS
INNODB_DATA_PENDING_FSYNCS
INNODB_DATA_PENDING_READS
INNODB_DATA_PENDING_WRITES
INNODB_DATA_READ
INNODB_DATA_READS
INNODB_DATA_WRITES
INNODB_DATA_WRITTEN
INNODB_DBLWR_PAGES_WRITTEN
INNODB_DBLWR_WRITES
INNODB_DEADLOCKS
INNODB_HISTORY_LIST_LENGTH
INNODB_LOG_WAITS
INNODB_LOG_WRITE_REQUESTS
INNODB_LOG_WRITES
INNODB_LSN_CURRENT
INNODB_LSN_FLUSHED
INNODB_LSN_LAST_CHECKPOINT
INNODB_MASTER_THREAD_ACTIVE_LOOPS
INNODB_MASTER_THREAD_IDLE_LOOPS
INNODB_MAX_TRX_ID
INNODB_MEM_DICTIONARY
INNODB_OS_LOG_WRITTEN
INNODB_PAGE_SIZE
INNODB_PAGES_CREATED
INNODB_PAGES_READ
INNODB_PAGES_WRITTEN
INNODB_ROW_LOCK_CURRENT_WAITS
INNODB_ROW_LOCK_TIME
INNODB_ROW_LOCK_TIME_AVG
INNODB_ROW_LOCK_TIME_MAX
INNODB_ROW_LOCK_WAITS
INNODB_NUM_OPEN_FILES
INNODB_TRUNCATED_STATUS_WRITES
INNODB_AVAILABLE_UNDO_LOGS
INNODB_UNDO_TRUNCATIONS
INNODB_PAGE_COMPRESSION_SAVED
INNODB_NUM_PAGES_PAGE_COMPRESSED
INNODB_NUM_PAGE_COMPRESSED_TRIM_OP
INNODB_NUM_PAGES_PAGE_DECOMPRESSED
INNODB_NUM_PAGES_PAGE_COMPRESSION_ERROR
INNODB_NUM_PAGES_ENCRYPTED
INNODB_NUM_PAGES_DECRYPTED
INNODB_HAVE_LZ4
INNODB_HAVE_LZO
INNODB_HAVE_LZMA
INNODB_HAVE_BZIP2
INNODB_HAVE_SNAPPY
INNODB_HAVE_PUNCH_HOLE
INNODB_DEFRAGMENT_COMPRESSION_FAILURES
INNODB_DEFRAGMENT_FAILURES
INNODB_DEFRAGMENT_COUNT
INNODB_INSTANT_ALTER_COLUMN
INNODB_ONLINEDDL_ROWLOG_ROWS
INNODB_ONLINEDDL_ROWLOG_PCT_USED
INNODB_ONLINEDDL_PCT_PROGRESS
INNODB_ENCRYPTION_ROTATION_PAGES_READ_FROM_CACHE
INNODB_ENCRYPTION_ROTATION_PAGES_READ_FROM_DISK
INNODB_ENCRYPTION_ROTATION_PAGES_MODIFIED
INNODB_ENCRYPTION_ROTATION_PAGES_FLUSHED
INNODB_ENCRYPTION_ROTATION_ESTIMATED_IOPS
INNODB_ENCRYPTION_N_MERGE_BLOCKS_ENCRYPTED
INNODB_ENCRYPTION_N_MERGE_BLOCKS_DECRYPTED
INNODB_ENCRYPTION_N_ROWLOG_BLOCKS_ENCRYPTED
INNODB_ENCRYPTION_N_ROWLOG_BLOCKS_DECRYPTED
INNODB_ENCRYPTION_N_TEMP_BLOCKS_ENCRYPTED
INNODB_ENCRYPTION_N_TEMP_BLOCKS_DECRYPTED
INNODB_ENCRYPTION_NUM_KEY_REQUESTS
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