MySQL Performance Problems Post: 303042204

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The Lounge What is on Your Mind? MySQL Performance Problems Post 303042204 by Neo on Wednesday 18th of December 2019 11:23:18 PM

12-19-2019

Administrator

FYI:

Code:

mysql> show variables like '%long_quer%';
+-----------------+----------+
| Variable_name   | Value    |
+-----------------+----------+
| long_query_time | 0.400000 |
+-----------------+----------+
1 row in set (0.01 sec)

Code:

ubuntu# mytop

MySQL on localhost (5.7.23)                                                                                                    load 0.97 1.18 1.38 2/1855 6627 up 0+21:55:36 [22:20:02]
 Queries: 29.3M    qps:  389 Slow:     0.0         Se/In/Up/De(%):    71/01/06/00 
 Sorts:    663 qps now:  291 Slow qps: 0.0  Threads:    3 (   1/  13) 71/01/06/00 
 Key Efficiency: 100.0%  Bps in/out: 75.9k/25.1M   Now in/out: 55.3k/19.8M

So, after a sampling of nearly 30M queries over the past day or so, no query was found over 0.40 sec.

Will reduce to 0.2 or 0.3 seconds at a later date (the next time I restart mysql) and test again.

Neo

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LEARN ABOUT LINUX

ndb_drop_table

NDB_DROP_TABLE(1)					       MySQL Database System						 NDB_DROP_TABLE(1)

NAME

       ndb_drop_table - drop an NDB table

SYNOPSIS

       ndb_drop_table options

DESCRIPTION

       ndb_drop_table drops the specified NDB table. (If you try to use this on a table created with a storage engine other than NDB, the attempt
       fails with the error 723: No such table exists.) This operation is extremely fast; in some cases, it can be an order of magnitude faster
       than using a MySQL DROP TABLE statement on an NDB table.
	       Usage

	   ndb_drop_table -c connect_string tbl_name -d db_name

       The following table includes options that are specific to ndb_drop_table. Additional descriptions follow the table. For options common to
       most MySQL Cluster programs (including ndb_drop_table), see Options Common to MySQL Cluster Programs(1).

       Table 17.19. ndb_drop_table Options and Variables: MySQL Cluster NDB 7.2
       +--------------------------+-----------------------------------+-------------------------------------+
       |Format			  | Description 		      | Added / Removed 		    |
       +--------------------------+-----------------------------------+-------------------------------------+
       |			  | Name of the database in which the | 				    |
       |       --database=dbname, | table is found		      |        All MySQL 5.5 based releases |
       |			  |				      | 				    |
       |       -d		  |				      | 				    |
       +--------------------------+-----------------------------------+-------------------------------------+

COPYRIGHT

       Copyright (C) 1997, 2014, Oracle and/or its affiliates. All rights reserved.

       This documentation is free software; you can redistribute it and/or modify it only under the terms of the GNU General Public License as
       published by the Free Software Foundation; version 2 of the License.

       This documentation is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
       MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

       You should have received a copy of the GNU General Public License along with the program; if not, write to the Free Software Foundation,
       Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or see http://www.gnu.org/licenses/.

SEE ALSO

       For more information, please refer to the MySQL Reference Manual, which may already be installed locally and which is also available online
       at http://dev.mysql.com/doc/.

AUTHOR

       Oracle Corporation (http://dev.mysql.com/).

MySQL 5.5							    01/30/2014							 NDB_DROP_TABLE(1)