Confluence "max_allowed_packet" Issue With Correct Values
Asked by Oguz Onat:

**Problem:**

I have Confluence installed with mySQL 5.7.25. When I'm trying to activate calendars, I'm receiving the error:
> An error occurred during installation. Configure your MySQL server with a higher max_allowed_packet as described in [Database Setup for MySQL](https://confluence.atlassian.com/x/6-YB).

I have modified the my.ini as suggested in the documentation, restarted the MySQL service then restarted the confluence service.

I would appreciate any helpful approach in advance.

**contents of the my.ini is as follows:**

# Other default tuning values  
# MySQL Server Instance Configuration File  
# ----------------------------------------------------------------------  
# Generated by the MySQL Server Instance Configuration Wizard  
#  
#  
# Installation Instructions  
# ----------------------------------------------------------------------  
#  
# On Linux you can copy this file to /etc/my.cnf to set global options,  
# mysql-data-dir/my.cnf to set server-specific options  
# (@localstatedir@ for this installation) or to  
# \~/.my.cnf to set user-specific options.  
#  
# On Windows you should keep this file in the installation directory  
# of your server (e.g. C:\\Program Files\\MySQL\\MySQL Server X.Y). To  
# make sure the server reads the config file use the startup option  
# "--defaults-file".  
#  
# To run the server from the command line, execute this in a  
# command line shell, e.g.  
# mysqld --defaults-file="C:\\Program Files\\MySQL\\MySQL Server X.Y\\my.ini"  
#  
# To install the server as a Windows service manually, execute this in a  
# command line shell, e.g.  
# mysqld --install MySQLXY --defaults-file="C:\\Program Files\\MySQL\\MySQL Server X.Y\\my.ini"  
#  
# And then execute this in a command line shell to start the server, e.g.  
# net start MySQLXY  
#  
#  
# Guidelines for editing this file  
# ----------------------------------------------------------------------  
#  
# In this file, you can use all long options that the program supports.  
# If you want to know the options a program supports, start the program  
# with the "--help" option.  
#  
# More detailed information about the individual options can also be  
# found in the manual.  
#  
# For advice on how to change settings please see  
# <https://dev.mysql.com/doc/refman/5.7/en/server-configuration-defaults.html>  
#  
#  
# CLIENT SECTION  
# ----------------------------------------------------------------------  
#  
# The following options will be read by MySQL client applications.  
# Note that only client applications shipped by MySQL are guaranteed  
# to read this section. If you want your own MySQL client program to  
# honor these values, you need to specify it as an option during the  
# MySQL client library initialization.  
#  
\[client\]  
max_allowed_packet=500M  
# pipe=

# socket=MYSQL

port=3306

\[mysql\]  
no-beep

# default-character-set=

# SERVER SECTION  
# ----------------------------------------------------------------------  
#  
# The following options will be read by the MySQL Server. Make sure that  
# you have installed the server correctly (see above) so it reads this  
# file.  
#  
# server_type=2  
\[mysqld\]  
transaction-isolation=READ-COMMITTED  
default-storage-engine=INNODB  
# max_allowed_packet=500M

# The next three options are mutually exclusive to SERVER_PORT below.  
# skip-networking  
# enable-named-pipe  
# shared-memory

# shared-memory-base-name=MYSQL

# The Pipe the MySQL Server will use  
# socket=MYSQL

# The TCP/IP Port the MySQL Server will listen on  
port=3306

# Path to installation directory. All paths are usually resolved relative to this.  
# basedir="C:/Program Files/MySQL/MySQL Server 5.7/"

# Path to the database root  
datadir=C:/ProgramData/MySQL/MySQL Server 5.7/Data

# The default character set that will be used when a new schema or table is  
# created and no character set is defined  
# character-set-server=

# The default storage engine that will be used when create new tables when  
default-storage-engine=INNODB

# Set the SQL mode to strict  
sql-mode="STRICT_TRANS_TABLES,NO_AUTO_CREATE_USER,NO_ENGINE_SUBSTITUTION"

# General and Slow logging.  
log-output=FILE

general-log=0

general_log_file="WIN-S48D9B9CT9I.log"

slow-query-log=1

slow_query_log_file="WIN-S48D9B9CT9I-slow.log"

long_query_time=10

# Binary Logging.  
# log-bin

# Error Logging.  
log-error="WIN-S48D9B9CT9I.err"

# Server Id.  
server-id=1

# Indicates how table and database names are stored on disk and used in MySQL.  
# Value = 0: Table and database names are stored on disk using the lettercase specified in the  
# CREATE TABLE or CREATE DATABASE statement. Name comparisons are case sensitive.  
# You should not set this variable to 0 if you are running MySQL on a system that has  
# case-insensitive file names (such as Windows or macOS).  
# Value = 1: Table names are stored in lowercase on disk and name comparisons are not  
# case-sensitive. MySQL converts all table names to lowercase on storage and lookup.  
# This behavior also applies to database names and table aliases.  
# Value = 3, Table and database names are stored on disk using the lettercase specified in the  
# CREATE TABLE or CREATE DATABASE statement, but MySQL converts them to lowercase on  
# lookup. Name comparisons are not case sensitive. This works only on file systems  
# that are not case-sensitive! InnoDB table names and view names are stored in  
# lowercase, as for Value = 1.  
# NOTE: lower_case_table_names can only be configured when initializing the server.  
# Changing the lower_case_table_names setting after the server is initialized is prohibited.  
lower_case_table_names=1

# Secure File Priv.  
secure-file-priv="C:/ProgramData/MySQL/MySQL Server 5.7/Uploads"

# The maximum amount of concurrent sessions the MySQL server will  
# allow. One of these connections will be reserved for a user with  
# SUPER privileges to allow the administrator to login even if the  
# connection limit has been reached.  
max_connections=151

# The number of open tables for all threads. Increasing this value  
# increases the number of file descriptors that mysqld requires.  
# Therefore you have to make sure to set the amount of open files  
# allowed to at least 4096 in the variable "open-files-limit" in  
# section \[mysqld_safe\]  
table_open_cache=2000

# Maximum size for internal (in-memory) temporary tables. If a table  
# grows larger than this value, it is automatically converted to disk  
# based table This limitation is for a single table. There can be many  
# of them.  
tmp_table_size=42M

# How many threads we should keep in a cache for reuse. When a client  
# disconnects, the client's threads are put in the cache if there aren't  
# more than thread_cache_size threads from before. This greatly reduces  
# the amount of thread creations needed if you have a lot of new  
# connections. (Normally this doesn't give a notable performance  
# improvement if you have a good thread implementation.)  
thread_cache_size=10

#\*\*\* MyISAM Specific options  
# The maximum size of the temporary file MySQL is allowed to use while  
# recreating the index (during REPAIR, ALTER TABLE or LOAD DATA INFILE.  
# If the file-size would be bigger than this, the index will be created  
# through the key cache (which is slower).  
myisam_max_sort_file_size=100G

# If the temporary file used for fast index creation would be bigger  
# than using the key cache by the amount specified here, then prefer the  
# key cache method. This is mainly used to force long character keys in  
# large tables to use the slower key cache method to create the index.  
myisam_sort_buffer_size=74M

# Size of the Key Buffer, used to cache index blocks for MyISAM tables.  
# Do not set it larger than 30% of your available memory, as some memory  
# is also required by the OS to cache rows. Even if you're not using  
# MyISAM tables, you should still set it to 8-64M as it will also be  
# used for internal temporary disk tables.  
key_buffer_size=8M

# Size of the buffer used for doing full table scans of MyISAM tables.  
# Allocated per thread, if a full scan is needed.  
read_buffer_size=64K

read_rnd_buffer_size=256K

#\*\*\* INNODB Specific options \*\*\*  
# innodb_data_home_dir=

# Use this option if you have a MySQL server with InnoDB support enabled  
# but you do not plan to use it. This will save memory and disk space  
# and speed up some things.  
# skip-innodb

# If set to 1, InnoDB will flush (fsync) the transaction logs to the  
# disk at each commit, which offers full ACID behavior. If you are  
# willing to compromise this safety, and you are running small  
# transactions, you may set this to 0 or 2 to reduce disk I/O to the  
# logs. Value 0 means that the log is only written to the log file and  
# the log file flushed to disk approximately once per second. Value 2  
# means the log is written to the log file at each commit, but the log  
# file is only flushed to disk approximately once per second.  
innodb_flush_log_at_trx_commit=1

# The size of the buffer InnoDB uses for buffering log data. As soon as  
# it is full, InnoDB will have to flush it to disk. As it is flushed  
# once per second anyway, it does not make sense to have it very large  
# (even with long transactions).  
innodb_log_buffer_size=1M

# InnoDB, unlike MyISAM, uses a buffer pool to cache both indexes and  
# row data. The bigger you set this the less disk I/O is needed to  
# access data in tables. On a dedicated database server you may set this  
# parameter up to 80% of the machine physical memory size. Do not set it  
# too large, though, because competition of the physical memory may  
# cause paging in the operating system. Note that on 32bit systems you  
# might be limited to 2-3.5G of user level memory per process, so do not  
# set it too high.  
innodb_buffer_pool_size=8M

# Size of each log file in a log group. You should set the combined size  
# of log files to about 25%-100% of your buffer pool size to avoid  
# unneeded buffer pool flush activity on log file overwrite. However,  
# note that a larger logfile size will increase the time needed for the  
# recovery process.  
innodb_log_file_size=2GB

# Number of threads allowed inside the InnoDB kernel. The optimal value  
# depends highly on the application, hardware as well as the OS  
# scheduler properties. A too high value may lead to thread thrashing.  
innodb_thread_concurrency=8

# The increment size (in MB) for extending the size of an auto-extend InnoDB system tablespace file when it becomes full.  
innodb_autoextend_increment=64

# The number of regions that the InnoDB buffer pool is divided into.  
# For systems with buffer pools in the multi-gigabyte range, dividing the buffer pool into separate instances can improve concurrency,  
# by reducing contention as different threads read and write to cached pages.  
innodb_buffer_pool_instances=8

# Determines the number of threads that can enter InnoDB concurrently.  
innodb_concurrency_tickets=5000

# Specifies how long in milliseconds (ms) a block inserted into the old sublist must stay there after its first access before  
# it can be moved to the new sublist.  
innodb_old_blocks_time=1000

# It specifies the maximum number of .ibd files that MySQL can keep open at one time. The minimum value is 10.  
innodb_open_files=300

# When this variable is enabled, InnoDB updates statistics during metadata statements.  
innodb_stats_on_metadata=0

# When innodb_file_per_table is enabled (the default in 5.6.6 and higher), InnoDB stores the data and indexes for each newly created table  
# in a separate .ibd file, rather than in the system tablespace.  
innodb_file_per_table=1

# Use the following list of values: 0 for crc32, 1 for strict_crc32, 2 for innodb, 3 for strict_innodb, 4 for none, 5 for strict_none.  
innodb_checksum_algorithm=0

# The number of outstanding connection requests MySQL can have.  
# This option is useful when the main MySQL thread gets many connection requests in a very short time.  
# It then takes some time (although very little) for the main thread to check the connection and start a new thread.  
# The back_log value indicates how many requests can be stacked during this short time before MySQL momentarily  
# stops answering new requests.  
# You need to increase this only if you expect a large number of connections in a short period of time.  
back_log=80

# If this is set to a nonzero value, all tables are closed every flush_time seconds to free up resources and  
# synchronize unflushed data to disk.  
# This option is best used only on systems with minimal resources.  
flush_time=0

# The minimum size of the buffer that is used for plain index scans, range index scans, and joins that do not use  
# indexes and thus perform full table scans.  
join_buffer_size=256K

# The maximum size of one packet or any generated or intermediate string, or any parameter sent by the  
# mysql_stmt_send_long_data() C API function.  
max_allowed_packet=4M

# If more than this many successive connection requests from a host are interrupted without a successful connection,  
# the server blocks that host from performing further connections.  
max_connect_errors=100

# Changes the number of file descriptors available to mysqld.  
# You should try increasing the value of this option if mysqld gives you the error "Too many open files".  
open_files_limit=4161

# If you see many sort_merge_passes per second in SHOW GLOBAL STATUS output, you can consider increasing the  
# sort_buffer_size value to speed up ORDER BY or GROUP BY operations that cannot be improved with query optimization  
# or improved indexing.  
sort_buffer_size=256K

# The number of table definitions (from .frm files) that can be stored in the definition cache.  
# If you use a large number of tables, you can create a large table definition cache to speed up opening of tables.  
# The table definition cache takes less space and does not use file descriptors, unlike the normal table cache.  
# The minimum and default values are both 400.  
table_definition_cache=1400

# Specify the maximum size of a row-based binary log event, in bytes.  
# Rows are grouped into events smaller than this size if possible. The value should be a multiple of 256.  
binlog_row_event_max_size=8K

# If the value of this variable is greater than 0, a replication slave synchronizes its master.info file to disk.  
# (using fdatasync()) after every sync_master_info events.  
sync_master_info=10000

# If the value of this variable is greater than 0, the MySQL server synchronizes its relay log to disk.  
# (using fdatasync()) after every sync_relay_log writes to the relay log.  
sync_relay_log=10000

# If the value of this variable is greater than 0, a replication slave synchronizes its relay-log.info file to disk.  
# (using fdatasync()) after every sync_relay_log_info transactions.  
sync_relay_log_info=10000

# Load mysql plugins at start."plugin_x ; plugin_y".  
plugin_load="mysqlx"

# The TCP/IP Port the MySQL Server X Protocol will listen on.  
loose_mysqlx_port=33060


Answers:
author: Shannon S
body: Hello Oguz,

Thank you for reaching out. Happy to assist.

The article refers to the max_allowed_packet under mysqld, but I see yours is commented out.

Could you try uncommenting that and let me know if you see a difference?

Regards,

Shannon


Tags: confluence-server

server