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High CPU - mysqltuner assistance (wordpress)



The Next CEO of Stack OverflowMySQL keeps crashing OS server.. Please help adjust my.ini!How do I allow mysqld to use more than 24.9% of my cpu?my battle against web-server monitoring - slow serverImprove server performance by configuring MySQLMySQL becomes unresponsive a few times per hourCentos MySQL optimization 4gb ramMySQL Tuning — High Memory Usagemysqltuner script to optimize my mysql databaseJoins performed without indexes: 5568MySQL my.cnf config for dedicated server










-1















I just migrated wordpress blog to new server. It has some 120K posts.



The problem is It get struck, hang or even freeze during mysql operation.
A single wordpress(without any plugin) create post operation consumes 60-80% of CPU. And when perform 3-5 database operation it goes frozen.
And there isn't any log for slow query.




System: Ubuntu 18.04 with 16GB RAM, 8 Core CPU, 120GB Disk and MySQL version 5.7.25




Here is mysqltuner and other reports



  • Mysqltuner:- https://pastebin.com/ZNYieJj8

  • htop:- https://pastebin.com/43f4b3fK

  • top:- https://pastebin.com/rTh1XvUt

  • INNODB STATUS:- https://pastebin.com/nGrZjHAg

  • GLOBAL VARIABLES: https://pastebin.com/K2fgKwEv

and current mysql.cnf



[mysqld]
# Skip reverse DNS lookup of clients
skip-name-resolve
default-storage-engine=InnoDB

max_allowed_packet=500M
max_connections = 256
interactive_timeout=7200
wait_timeout=7200

innodb_file_per_table=1
innodb_buffer_pool_size = 8G
innodb_buffer_pool_instances = 4
innodb_log_file_size = 1G
innodb_flush_log_at_trx_commit = 1
innodb_flush_method = O_DIRECT
innodb_open_files=5000
innodb_io_capacity=2000
innodb_io_capacity_max=4000
innodb_old_blocks_time=2000
open_files_limit=50000

query_cache_type = 1
query_cache_min_res_unit = 1M
query_cache_limit = 1M
query_cache_size = 50M

tmp_table_size= 256M
max_heap_table_size= 256M

#key_buffer_size = 128M
thread_stack = 128K
thread_cache_size = 32

slow-query-log = 1
slow-query-log-file = /var/lib/mysql/mysql-slow.log
long_query_time = 1


Edit:
Initial mysql.cnf variables I pasted above had some incorrect/changed values comparing those of when generating mysqltuner report. corrected thank you @EchoMike444










share|improve this question









New contributor




TELA is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
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  • your current mysql,cnfdoes not match what we see in MysqlTuner / Htop . innodb_buffer_pool_size in you files is 4G , it seem to be 8G

    – EchoMike444
    yesterday











  • your database size seem to be small 2G , can you confirm ?

    – EchoMike444
    yesterday











  • how did you migrate the database ?

    – EchoMike444
    yesterday











  • mysql.cnf variables I pasted above had some incorrect/changed values comparing those of when generating mysqltuner report. corrected. Sorry and thank you @EchoMike444

    – TELA
    yesterday











  • Actually I did not migrate the database as a whole and it was not possible at old server due to limited access. I just created an API and inserted using wp_insert_post() at new wp installation.

    – TELA
    yesterday
















-1















I just migrated wordpress blog to new server. It has some 120K posts.



The problem is It get struck, hang or even freeze during mysql operation.
A single wordpress(without any plugin) create post operation consumes 60-80% of CPU. And when perform 3-5 database operation it goes frozen.
And there isn't any log for slow query.




System: Ubuntu 18.04 with 16GB RAM, 8 Core CPU, 120GB Disk and MySQL version 5.7.25




Here is mysqltuner and other reports



  • Mysqltuner:- https://pastebin.com/ZNYieJj8

  • htop:- https://pastebin.com/43f4b3fK

  • top:- https://pastebin.com/rTh1XvUt

  • INNODB STATUS:- https://pastebin.com/nGrZjHAg

  • GLOBAL VARIABLES: https://pastebin.com/K2fgKwEv

and current mysql.cnf



[mysqld]
# Skip reverse DNS lookup of clients
skip-name-resolve
default-storage-engine=InnoDB

max_allowed_packet=500M
max_connections = 256
interactive_timeout=7200
wait_timeout=7200

innodb_file_per_table=1
innodb_buffer_pool_size = 8G
innodb_buffer_pool_instances = 4
innodb_log_file_size = 1G
innodb_flush_log_at_trx_commit = 1
innodb_flush_method = O_DIRECT
innodb_open_files=5000
innodb_io_capacity=2000
innodb_io_capacity_max=4000
innodb_old_blocks_time=2000
open_files_limit=50000

query_cache_type = 1
query_cache_min_res_unit = 1M
query_cache_limit = 1M
query_cache_size = 50M

tmp_table_size= 256M
max_heap_table_size= 256M

#key_buffer_size = 128M
thread_stack = 128K
thread_cache_size = 32

slow-query-log = 1
slow-query-log-file = /var/lib/mysql/mysql-slow.log
long_query_time = 1


Edit:
Initial mysql.cnf variables I pasted above had some incorrect/changed values comparing those of when generating mysqltuner report. corrected thank you @EchoMike444










share|improve this question









New contributor




TELA is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.




















  • your current mysql,cnfdoes not match what we see in MysqlTuner / Htop . innodb_buffer_pool_size in you files is 4G , it seem to be 8G

    – EchoMike444
    yesterday











  • your database size seem to be small 2G , can you confirm ?

    – EchoMike444
    yesterday











  • how did you migrate the database ?

    – EchoMike444
    yesterday











  • mysql.cnf variables I pasted above had some incorrect/changed values comparing those of when generating mysqltuner report. corrected. Sorry and thank you @EchoMike444

    – TELA
    yesterday











  • Actually I did not migrate the database as a whole and it was not possible at old server due to limited access. I just created an API and inserted using wp_insert_post() at new wp installation.

    – TELA
    yesterday














-1












-1








-1








I just migrated wordpress blog to new server. It has some 120K posts.



The problem is It get struck, hang or even freeze during mysql operation.
A single wordpress(without any plugin) create post operation consumes 60-80% of CPU. And when perform 3-5 database operation it goes frozen.
And there isn't any log for slow query.




System: Ubuntu 18.04 with 16GB RAM, 8 Core CPU, 120GB Disk and MySQL version 5.7.25




Here is mysqltuner and other reports



  • Mysqltuner:- https://pastebin.com/ZNYieJj8

  • htop:- https://pastebin.com/43f4b3fK

  • top:- https://pastebin.com/rTh1XvUt

  • INNODB STATUS:- https://pastebin.com/nGrZjHAg

  • GLOBAL VARIABLES: https://pastebin.com/K2fgKwEv

and current mysql.cnf



[mysqld]
# Skip reverse DNS lookup of clients
skip-name-resolve
default-storage-engine=InnoDB

max_allowed_packet=500M
max_connections = 256
interactive_timeout=7200
wait_timeout=7200

innodb_file_per_table=1
innodb_buffer_pool_size = 8G
innodb_buffer_pool_instances = 4
innodb_log_file_size = 1G
innodb_flush_log_at_trx_commit = 1
innodb_flush_method = O_DIRECT
innodb_open_files=5000
innodb_io_capacity=2000
innodb_io_capacity_max=4000
innodb_old_blocks_time=2000
open_files_limit=50000

query_cache_type = 1
query_cache_min_res_unit = 1M
query_cache_limit = 1M
query_cache_size = 50M

tmp_table_size= 256M
max_heap_table_size= 256M

#key_buffer_size = 128M
thread_stack = 128K
thread_cache_size = 32

slow-query-log = 1
slow-query-log-file = /var/lib/mysql/mysql-slow.log
long_query_time = 1


Edit:
Initial mysql.cnf variables I pasted above had some incorrect/changed values comparing those of when generating mysqltuner report. corrected thank you @EchoMike444










share|improve this question









New contributor




TELA is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.












I just migrated wordpress blog to new server. It has some 120K posts.



The problem is It get struck, hang or even freeze during mysql operation.
A single wordpress(without any plugin) create post operation consumes 60-80% of CPU. And when perform 3-5 database operation it goes frozen.
And there isn't any log for slow query.




System: Ubuntu 18.04 with 16GB RAM, 8 Core CPU, 120GB Disk and MySQL version 5.7.25




Here is mysqltuner and other reports



  • Mysqltuner:- https://pastebin.com/ZNYieJj8

  • htop:- https://pastebin.com/43f4b3fK

  • top:- https://pastebin.com/rTh1XvUt

  • INNODB STATUS:- https://pastebin.com/nGrZjHAg

  • GLOBAL VARIABLES: https://pastebin.com/K2fgKwEv

and current mysql.cnf



[mysqld]
# Skip reverse DNS lookup of clients
skip-name-resolve
default-storage-engine=InnoDB

max_allowed_packet=500M
max_connections = 256
interactive_timeout=7200
wait_timeout=7200

innodb_file_per_table=1
innodb_buffer_pool_size = 8G
innodb_buffer_pool_instances = 4
innodb_log_file_size = 1G
innodb_flush_log_at_trx_commit = 1
innodb_flush_method = O_DIRECT
innodb_open_files=5000
innodb_io_capacity=2000
innodb_io_capacity_max=4000
innodb_old_blocks_time=2000
open_files_limit=50000

query_cache_type = 1
query_cache_min_res_unit = 1M
query_cache_limit = 1M
query_cache_size = 50M

tmp_table_size= 256M
max_heap_table_size= 256M

#key_buffer_size = 128M
thread_stack = 128K
thread_cache_size = 32

slow-query-log = 1
slow-query-log-file = /var/lib/mysql/mysql-slow.log
long_query_time = 1


Edit:
Initial mysql.cnf variables I pasted above had some incorrect/changed values comparing those of when generating mysqltuner report. corrected thank you @EchoMike444







mysql wordpress cpu-usage






share|improve this question









New contributor




TELA is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.











share|improve this question









New contributor




TELA is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.









share|improve this question




share|improve this question








edited yesterday







TELA













New contributor




TELA is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.









asked yesterday









TELATELA

11




11




New contributor




TELA is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.





New contributor





TELA is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.






TELA is a new contributor to this site. Take care in asking for clarification, commenting, and answering.
Check out our Code of Conduct.












  • your current mysql,cnfdoes not match what we see in MysqlTuner / Htop . innodb_buffer_pool_size in you files is 4G , it seem to be 8G

    – EchoMike444
    yesterday











  • your database size seem to be small 2G , can you confirm ?

    – EchoMike444
    yesterday











  • how did you migrate the database ?

    – EchoMike444
    yesterday











  • mysql.cnf variables I pasted above had some incorrect/changed values comparing those of when generating mysqltuner report. corrected. Sorry and thank you @EchoMike444

    – TELA
    yesterday











  • Actually I did not migrate the database as a whole and it was not possible at old server due to limited access. I just created an API and inserted using wp_insert_post() at new wp installation.

    – TELA
    yesterday


















  • your current mysql,cnfdoes not match what we see in MysqlTuner / Htop . innodb_buffer_pool_size in you files is 4G , it seem to be 8G

    – EchoMike444
    yesterday











  • your database size seem to be small 2G , can you confirm ?

    – EchoMike444
    yesterday











  • how did you migrate the database ?

    – EchoMike444
    yesterday











  • mysql.cnf variables I pasted above had some incorrect/changed values comparing those of when generating mysqltuner report. corrected. Sorry and thank you @EchoMike444

    – TELA
    yesterday











  • Actually I did not migrate the database as a whole and it was not possible at old server due to limited access. I just created an API and inserted using wp_insert_post() at new wp installation.

    – TELA
    yesterday

















your current mysql,cnfdoes not match what we see in MysqlTuner / Htop . innodb_buffer_pool_size in you files is 4G , it seem to be 8G

– EchoMike444
yesterday





your current mysql,cnfdoes not match what we see in MysqlTuner / Htop . innodb_buffer_pool_size in you files is 4G , it seem to be 8G

– EchoMike444
yesterday













your database size seem to be small 2G , can you confirm ?

– EchoMike444
yesterday





your database size seem to be small 2G , can you confirm ?

– EchoMike444
yesterday













how did you migrate the database ?

– EchoMike444
yesterday





how did you migrate the database ?

– EchoMike444
yesterday













mysql.cnf variables I pasted above had some incorrect/changed values comparing those of when generating mysqltuner report. corrected. Sorry and thank you @EchoMike444

– TELA
yesterday





mysql.cnf variables I pasted above had some incorrect/changed values comparing those of when generating mysqltuner report. corrected. Sorry and thank you @EchoMike444

– TELA
yesterday













Actually I did not migrate the database as a whole and it was not possible at old server due to limited access. I just created an API and inserted using wp_insert_post() at new wp installation.

– TELA
yesterday






Actually I did not migrate the database as a whole and it was not possible at old server due to limited access. I just created an API and inserted using wp_insert_post() at new wp installation.

– TELA
yesterday











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