| Commit message (Collapse) | Author | Age | Files | Lines |
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file=open(...)
for l in file:
if l.startswith('SAMPLE') and not l.startswith('SAMPLE root'):
print(l)
n = dict((p.split('=')
for p in l.replace('SAMPLE ', '').replace(' REJECT', '').split()
))
if 'REJECT' in l:
n['rej']=True
nodes.append(n)
max(int(n['size']) for n in nodes)
max((float(n['p']), serialize(n)) for n in nodes)
max((float(n['size']), serialize(n)) for n in nodes if n['height'] == '0')
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A complete generated table fixture was added. Unfortunately, imported
tables behave bad in innodb. They are subject for checksumming on and on,
so it's better to ALTER TABLE FORCE them before actually profiling.
Usage:
Put vehicle_reg.ibd in mysq-test/std_data. (cant push it; too large)
./mtr --mem main.profile
It will emit notice, that you should rerun it with --start-dirty.
Wait ~two minutes.
Check that var/mysqld.1 directory is there. If not,
it was archived by mtr. Run:
mv var/log/main.profile-innodb/mysqld.1 var
Now rerun with the dirty dir:
./mtr main.profile --start-dirty --vardir=`pwd`/var --suite=main
You can add --gprof to collect the profiling data.
Make sure you've compiled mariadbd with -DWITH_GPROF=1.
Open gprof.msg and navigate to Call graph.
Dont use IDE to open! The file is huge. Vim/emacs is best, but maybe
sublime would work, too.
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MDEV-27025 allows to insert records before the record on which DELETE is
locked, as a result the DELETE misses those records, what causes serious ACID
violation.
Revert MDEV-27025, MDEV-27550. The test which shows the scenario of ACID
violation is added.
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btr_cur_optimistic_insert(): Disregard DEBUG_DBUG injection to
invoke btr_page_reorganize() if the page (and the table) is empty.
Otherwise, an assertion would fail in btr_page_reorganize_low()
because PAGE_MAX_TRX_ID is 0 in an empty secondary index leaf page.
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Fixed by not sending --group option to the server (for now)
Reviwer: Sergei Golubchik
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udf_handler::fix_fields(): Execute an assignment outside "if"
so that GCC 12 will not issue a bogus-looking warning.
Also, deduplicate some error handling code.
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The virtual member function handler::reset_auto_increment(ulonglong)
is only ever invoked by the default implementation of the virtual
member function handler::truncate().
Because ha_innobase::truncate() overrides handler::truncate() without
ever invoking handler::truncate(), some InnoDB member functions are
never called.
ha_innobase::innobase_reset_autoinc(), ha_innobase::reset_auto_increment():
Removed (unreachable code).
ha_innobase::delete_all_rows(): Removed. The default implementation
handler::delete_all_rows() works just as fine.
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- InnoDB FTS DDL decrements the FTS_DOC_ID when there is a
deleted marked record involved. FTS_DOC_ID must never be
reused. The purpose of FTS_DOC_ID is to be a unique row
identifier that will be changed whenever a fulltext indexed
column is updated.
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- Server incorrectly downgrading the MDL after prepare phase when
table is empty. mdl_exclusive_after_prepare is being set in
prepare phase only. But mdl_exclusive_after_prepare condition was
misplaced and checked before prepare phase by
commit d270525dfde86bcb92a2327234a0954083e14a94 and it is now
changed to check after prepare phase.
- main.innodb_mysql_sync test case was changed to avoid locking
optimization when table is empty.
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maturity level
Fix: Bumped maturity of the mysql_json plugin to gamma.
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During an increase in resize, the new curr_size got a value
less than old_size.
As n_chunks_new and n_chunks have a strong correlation to the
resizing operation in progress, we can use them and remove the
need for old_size.
For convienece the n_chunks_new < n_chunks is now the is_shrinking
function.
The volatile compiler optimization on n_chunks{,_new} is removed
as real mutex uses are needed.
Other n_chunks_new/n_chunks methods:
n_chunks_new and n_chunks almost always read and altered under
the pool mutex.
Exceptions are:
* i_s_innodb_buffer_page_fill,
* buf_pool_t::is_uncompressed (via is_blocked_field)
These need reexamining for the need of a mutex, however comments
indicates this already.
get_n_pages has uses in buffer pool load, recover log memory
exhaustion estimates and innodb status so take the minimum number
of chunks for safety.
The buf_pool_t::running_out function also uses curr_size/old_size.
We replace this hot function calculation with just n_chunks_new.
This is the new size of the chunks before the resizing occurs.
If we are resizing down, we've already got the case we had previously
(as the minimum). If we are resizing upwards, we are taking an
optimistic view that there will be buffer chunks available for locks.
As this memory allocation is occurring immediately next the resizing
function it seems likely.
Compiler hint UNIV_UNLIKELY removed to leave it to the branch
predictor to make an informed decision.
Added test case of a smaller size than the Marko/Roel original
in JIRA reducing the size to 256M. SEGV hits roughly 1/10 times
but its better than a 21G memory size.
Reviewer: Marko
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Among others:
existance -> existence
reinitialze -> reinitialize
successfuly -> successfully
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create_table_info_t::innobase_table_flags(): Ignore page_compressed
and page_compression_level on TEMPORARY tables.
ha_innobase::truncate(): Add a debug assertion that create() must succeed
on temporary tables.
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The test innodb.log_file_size would occasionally crash in
a debug assertion failure in srv_prepare_to_delete_redo_log_file().
In the core dump, the assertion would hold.
buf_pool_t::any_io_pending(): Avoid dirty reads by acquiring
buf_pool.mutex. This function is only being invoked in debug builds,
so we do not care about any performance impact.
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