Very slow mysql queryies

Hello,
I have a problem with very slow mysql insert queries. Inserting 10k record takes serveral minuts.
My specification:

• Intel Xeon E3 1231v3
  4 8- 3,4 GHz
• 32 GB RAM
  DDR3 ECC 1600 MHz
• 2x2TB SOFT

• CENTOS 7.2 x86_64 standard – ns3032115

• WHM 11.52.3 (build 1)

• MySQL 5.6
  
  I'm using default apache,php and mysql settings. What is wrong?

 

On my previous virtual server, this operation dealt up to several seconds.

Code:

Report Generated:
Tue Feb 9 23:45:33 CET 2016

-------------------------------------------------
mysqltuner output
-------------------------------------------------
mysqltuner.pl [found]
>>  MySQLTuner 1.6.4 - Major Hayden <major@mhtx.net>
>>  Bug reports, feature requests, and downloads at http://mysqltuner.com/
>>  Modified by George Liu (eva2000) at http://vbtechsupport.com/
>>  Run with '--help' for additional options and output filtering
[--] Skipped version check for MySQLTuner script
[OK] Currently running supported MySQL version 5.6.28
[OK] Operating on 64-bit architecture

-------- Storage Engine Statistics -------------------------------------------
[--] Status: +ARCHIVE +BLACKHOLE +CSV -FEDERATED +InnoDB +MRG_MYISAM
[--] Data in MyISAM tables: 274K (Tables: 18)
[--] Data in InnoDB tables: 8M (Tables: 32)
[!!] Total fragmented tables: 4

-------- Security Recommendations  -------------------------------------------
[OK] There are no anonymous accounts for any database users
[OK] All database users have passwords assigned
[!!] There is no basic password file list!

-------- CVE Security Recommendations  ---------------------------------------
[--] Skipped due to --cvefile option undefined

-------- Performance Metrics -------------------------------------------------
[--] Up for: 5h 27m 54s (47K q [2.399 qps], 5K conn, TX: 511M, RX: 2M)
[--] Reads / Writes: 30% / 70%
[--] Binary logging is disabled
[--] Total buffers: 169.0M global + 1.1M per thread (151 max threads)
[OK] Maximum reached memory usage: 173.5M (0.54% of installed RAM)
[OK] Maximum possible memory usage: 338.9M (1.06% of installed RAM)
[OK] Slow queries: 0% (0/47K)
[OK] Highest usage of available connections: 2% (4/151)
[OK] Aborted connections: 1.07%  (56/5228)
[!!] Query cache is disabled
[OK] Sorts requiring temporary tables: 0% (0 temp sorts / 1K sorts)
[OK] Temporary tables created on disk: 2% (51 on disk / 2K total)
[OK] Thread cache hit rate: 99% (4 created / 5K connections)
[OK] Table cache hit rate: 92% (138 open / 149 opened)
[OK] Open file limit used: 0% (88/65K)
[OK] Table locks acquired immediately: 100% (28K immediate / 28K locks)

-------- MyISAM Metrics ------------------------------------------------------
[!!] Key buffer used: 19.8% (1M used / 8M cache)
[OK] Key buffer size / total MyISAM indexes: 8.0M/196.0K
[OK] Read Key buffer hit rate: 97.0% (3K cached / 98 reads)
[!!] Write Key buffer hit rate: 1.5% (1K cached / 1K writes)

-------- InnoDB Metrics ------------------------------------------------------
[--] InnoDB is enabled.
[OK] InnoDB buffer pool / data size: 128.0M/8.1M
[!!] InnoDB buffer pool <= 1G and innodb_buffer_pool_instances(!=1).
[!!] InnoDB Used buffer: 9.62% (788 used/ 8192 total)
[OK] InnoDB Read buffer efficiency: 99.98% (4715933 hits/ 4716717 total)
[!!] InnoDB Write buffer efficiency: 0.00% (0 hits/ 1 total)
[OK] InnoDB log waits: 0.00% (0 waits / 19035 writes)

-------- ThreadPool Metrics --------------------------------------------------
[--] ThreadPool stat is disabled.

-------- AriaDB Metrics ------------------------------------------------------
[--] AriaDB is disabled.

-------- TokuDB Metrics ------------------------------------------------------
[--] TokuDB is disabled.

-------- Galera Metrics ------------------------------------------------------
[--] Galera is disabled.

-------- Replication Metrics -------------------------------------------------
[--] No replication slave(s) for this server.
[--] This is a standalone server..

-------- Recommendations -----------------------------------------------------
General recommendations:
    Run OPTIMIZE TABLE to defragment tables for better performance
    MySQL started within last 24 hours - recommendations may be inaccurate
Variables to adjust:
    query_cache_type (=1)
    innodb_buffer_pool_instances (=1)

Report Complete:
Tue Feb 9 23:45:34 CET 2016

 

Hello, this problem is solved.
I noticed that my sites do not work the for few minutes when traffic traffic is higher. How to check why? Which parameters should be increased?