mysql error: Can't create a new thread (errno 11);

Hello everyone.

I have a db server running Percona Xtradb server, and 5 slaves. I always get the error

mysql error: Can't create a new thread (errno 11); if you are not out of available memory, you can consult the manual for a possible OS-dependent bug

Though i set ulimited

root@master:~# ulimit -a core file size (blocks, -c) 0 data seg size (kbytes, -d) unlimited scheduling priority (-e) 0 file size (blocks, -f) unlimited pending signals (-i) 2062915 max locked memory (kbytes, -l) 64 max memory size (kbytes, -m) unlimited open files (-n) 1000000 pipe size (512 bytes, -p) 8 POSIX message queues (bytes, -q) 819200 real-time priority (-r) 0 stack size (kbytes, -s) 8192 cpu time (seconds, -t) unlimited max user processes (-u) 1000000 virtual memory (kbytes, -v) unlimited file locks (-x) unlimited

root@master:~# cat /proc/`pidof mysqld`/limits | egrep "(processes|files)"Max processes 1000000 1000000 processes Max open files 1000000 1000000 files

I really dont know what's going on? Please help me.

Thanks,

what OS/version etc? what does your my.cnf contain?

[client]
port            = 3306
socket          = /var/run/mysqld/mysqld.sock

[mysqld_safe]
socket          = /var/run/mysqld/mysqld.sock
nice            = 0

[mysqld]
#old_passwords=1
character_set_server=utf8
#
# * Basic Settings
#
user            = mysql
pid-file        = /var/run/mysqld/mysqld.pid
socket          = /var/run/mysqld/mysqld.sock
port            = 3306
basedir         = /usr
datadir         = /home/mysql/
tmpdir          = /tmp
#lc-messages-dir        = /usr/share/mysql

skip-external-locking


default_storage_engine         = MyISAM
# MyISAM #
key_buffer_size                = 5G
myisam_recover                 = FORCE,BACKUP

# SAFETY #
max_allowed_packet             = 16M
#max_connect_errors             = 10000
innodb                         = FORCE
#explicit_defaults_for_timestamp
#skip_secure_auth


# BINARY LOGGING #
#log_bin                        = /home/mysql/mysql-bin
#expire_logs_days               = 14
#sync_binlog                    = 1

read_buffer_size = 512M
read_rnd_buffer_size = 256M
sort_buffer_size = 128M
join_buffer_size = 128M

# CACHES AND LIMITS #
tmp_table_size                 = 256M
max_heap_table_size            = 64M
query_cache_type               = 1
query_cache_size               = 256M
query_cache_limit              = 256M
max_connections                = 40400
#wait_timeout                  = 60
thread_cache_size              = 100
open_files_limit               = 602400
#table_definition_cache         = 4096
table_open_cache               = 524288

tmp_table_size                 = 512M
#table_cache                   = 40096
# INNODB #
innodb_flush_method            = O_DIRECT
innodb_log_files_in_group      = 2
innodb_log_file_size           = 32M
innodb_flush_log_at_trx_commit = 1
innodb_file_per_table          = 1
innodb_buffer_pool_size        = 8M

# LOGGING #
log_error                      = /var/log/mysql/mysql-error.log

I get this error whenever server reaches 32k

Originally Posted by voda22 I get this error whenever server reaches 32k

Reaches 32k what? Connections?

What OS (Distro & Version) and MySql version are you running, and how much memory do you have?

Originally Posted by Ginola Reaches 32k what? Connections? What OS (Distro & Version) and MySql version are you running, and how much memory do you have?

Im using ubuntu 12.04.02, mysql is 5.5 and i have 265 GB RAM. Yes, i found out that i had a lot of opening tables and meta locking.