> Ken Task
thank you for your answer.
I filled only activity name, tool URL, consumer key, and secret.(This is like LTI 1.1.)
There are five extensions of PHP by "php -m|grep xml".
libxml
xml
xmlreader
xmlrpc
xmlwriter
I checked my database using MySQL Tuner.
[result of MySQL check](I'm sorry. this is so long...)
>> MySQLTuner 1.6.0 - Major Hayden <major@mhtx.net>
>> Bug reports, feature requests, and downloads at http://mysqltuner.com/
>> Run with '--help' for additional options and output filtering
[--] Skipped version check for MySQLTuner script
[OK] Currently running supported MySQL version 5.6.36
[OK] Operating on 64-bit architecture
-------- Storage Engine Statistics -------------------------------------------
[--] Status: +ARCHIVE +BLACKHOLE +CSV
-FEDERATED +InnoDB +MRG_MYISAM
[--] Data in InnoDB tables: 18M (Tables: 370)
[OK] Total fragmented tables: 0
-------- Security Recommendations -------------------------------------------
[OK] There is no anonymous account in all database users
[!!] User 'user@localhost' has no password set.
[!!] There is not basic password file list !
-------- Performance Metrics -------------------------------------------------
[--] Up for: 26m 28s (484 q [0.305 qps], 113 conn, TX: 545K, RX: 62K)
[--] Reads / Writes: 92% / 8%
[--] Binary logging is disabled
[--] Total buffers: 169.0M global + 1.1M per thread (151 max threads)
[OK] Maximum reached memory usage: 170.1M (8.48% of installed RAM)
[OK] Maximum possible memory usage: 338.9M (16.89% of installed RAM)
[OK] Slow queries: 0% (0/484)
[OK] Highest usage of available connections: 0% (1/151)
[!!] Aborted connections: 9.73% (11/113)
[OK] Query cache efficiency: 25.2% (78 cached / 310 selects)
[OK] Query cache prunes per day: 0
[OK] Sorts requiring temporary tables: 0% (0 temp sorts / 32 sorts)
[OK] Temporary tables created on disk: 4% (3 on disk / 70 total)
[OK] Thread cache hit rate: 99% (1 created / 113 connections)
[OK] Table cache hit rate: 98% (454 open / 461 opened)
[OK] Open file limit used: 0% (48/5K)
[OK] Table locks acquired immediately: 100% (221 immediate / 221 locks)
-------- MyISAM Metrics -----------------------------------------------------
[!!] Key buffer used: 18.2% (1M used / 8M cache)
[OK] Key buffer size / total MyISAM indexes: 8.0M/97.0K
[!!] Read Key buffer hit rate: 90.0% (10 cached / 1 reads)
-------- InnoDB Metrics -----------------------------------------------------
[--] InnoDB is enabled.
[OK] InnoDB buffer pool / data size: 128.0M/18.5M
[OK] InnoDB buffer pool instances: 1
[!!] InnoDB Used buffer: 21.07% (1726 used/ 8191 total)
[OK] InnoDB Read buffer efficiency: 94.58% (30040 hits/ 31761 total)
[!!] InnoDB Write buffer efficiency: 0.00% (0 hits/ 1 total)
[OK] InnoDB log waits: 0.00% (0 waits / 14 writes)
-------- AriaDB Metrics -----------------------------------------------------
[--] AriaDB is disabled.
-------- Replication Metrics -------------------------------------------------
[--] No replication slave(s) for this server.
[--] This is a standalone server..
-------- Recommendations -----------------------------------------------------
General recommendations:
Set up a Password for user with the following SQL statement ( SET PASSWORD FOR 'user'@'SpecificDNSorIp' = PASSWORD('secure_password'); )
MySQL started within last 24 hours - recommendations may be inaccurate
Reduce or eliminate unclosed connections and network issues