stackoverflow.com/questions/31620082/apache-memory-error
What appears as modify in syst file is commented,
I do not see any meaning to it, then where the values are really modified so I can put the shared memory I need
File: /etc/sysctl.conf
Code:
Fatal Error Unable to allocate [B]shared memory segment
in my serverUse ipcs -lm to determine current shared memory limits. And use ipcs -ma to determine how much shared memory is currently in use.
UPDATE you have added the comment to show "max seg size (kbytes) = 32768". So max segment size is 32MB. Original error is "Unable to allocate shared memory segment of 67108864 bytes". So unable to allocate segment of 64MB.
Increase your maximum shared memory segment size from 32MB to 128MB.
echo "134217728" >/proc/sys/kernel/shmmax
echo "134217728" >/proc/sys/kernel/shmall
And then retry. If apache2 then works ok, make the change survive reboots, by placing an entry in /etc/sysctl.conf as below:
kernel.shmmax=134217728
kernel.shmall=134217728
Code:
# ipcs -lm
------ Shared Memory Limits --------
max number of segments = 4096
max seg size (kbytes) = 32768
max total shared memory (kbytes) = 8388608
min seg size (bytes) = 1
# ipcs -ma
------ Shared Memory Segments --------
key shmid owner perms bytes nattch status
------ Semaphore Arrays --------
key semid owner perms nsems
0x00000000 0 root 600 1
0x00000000 5275649 nobody 600 1
0x00000000 5046274 nobody 600 1
0x00000000 5079043 nobody 600 1
0x00000000 5308420 nobody 600 1
0x00000000 5341189 nobody 600 1
0x00000000 5373958 nobody 600 1
------ Message Queues --------
key msqid owner perms used-bytes messages
I do not see any meaning to it, then where the values are really modified so I can put the shared memory I need
File: /etc/sysctl.conf
Code:
# Kernel sysctl configuration file for Red Hat Linux
#
# For binary values, 0 is disabled, 1 is enabled. See sysctl(8) and
# sysctl.conf(5) for more details.
# Controls IP packet forwarding
net.ipv4.ip_forward = 0
# Controls source route verification
# net.ipv4.conf.default.rp_filter = 1
# Do not accept source routing
# net.ipv4.conf.default.accept_source_route = 0
# Controls the System Request debugging functionality of the kernel
# kernel.sysrq = 0
# Controls whether core dumps will append the PID to the core filename.
# Useful for debugging multi-threaded applications.
# kernel.core_uses_pid = 1
# Controls the use of TCP syncookies
net.ipv4.tcp_syncookies = 1
# Controls the default maxmimum size of a mesage queue
# kernel.msgmnb = 65536
# Controls the maximum size of a message, in bytes
# kernel.msgmax = 65536
# Controls the maximum shared segment size, in bytes
# kernel.shmmax = 68719476736
# Controls the maximum number of shared memory segments, in pages
# kernel.shmall = 4294967296
[/quote]
Last edited by a moderator: