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As you can see in the below command I have assigned a total of 500 GB disk space to my VM. But I am seeing 14.4 GB actual space available to the disk and once it gets used completely. I got an error there isn't much space to use? How to extend space for /dev/mapper/centos-root.
I am using VMware ESXi and using centOS for this VM.
[root#localhost Apr]# fdisk -l
Disk /dev/sda: 536.9 GB, 536870912000 bytes, 1048576000 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk label type: dos
Disk identifier: 0x00064efd
Device Boot Start End Blocks Id System
/dev/sda1 * 2048 2099199 1048576 83 Linux
/dev/sda2 2099200 33554431 15727616 8e Linux LVM
Disk /dev/mapper/centos-root: 14.4 GB, 14382268416 bytes, 28090368 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk /dev/mapper/centos-swap: 1719 MB, 1719664640 bytes, 3358720 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 byte
Execute bellow Steps to increase your Linux Disk after adding space in VMWare :
Step 1 - update partition table
fdisk /dev/sda
Press p to print the partition table to identify the number of partitions.
Press n to create a new primary partition.
Press p for primary.
Press 3 for the partition number, depending on the output of the partition table print.
Press Enter two times.
Press t to change the system's partition ID.
Press 3 to select the newly creation partition.
Type 8e to change the Hex Code of the partition for Linux LVM.
Press w to write the changes to the partition table.
Step 2 - Restart the virtual machine.
Step 3 - verify that the changes were saved
fdisk -l
Step 4 - convert the new partition to a physical volume
pvcreate /dev/sda3
Step 5 - extend the physical volume (centos is your VG name, if not use your VG name in place of centos )
vgextend centos /dev/sda3
Step 6 - extend the Logical Volume (500G is the size you want to add , if not use the right size in place of 500G)
lvextend -L+500G /dev/mapper/centos-root
Step 7 - expand the ext filesystem online
resize2fs /dev/mapper/centos-root
extend disk without reboot
echo 1 > /sys/block/sda/device/rescan
echo 1 > /sys/block/sdb/device/rescan
echo 1 > /sys/block/nvme0n1/device/rescan_controller
partprobe
gdisk fix warnging
parted change partion size
## parted can executed as command line. but this is very dangerous
parted -s /dev/sdb "resizepart 2 -1" quit
parted -s /dev/sdb "resizepart 3 100%" quit
resizepart 3 100%
pvresize /dev/sda3
lvextend -l +100%FREE cs/root
xfs_growfs /dev/cs/root
I am very newbie in OrangePI PC. I have installed it by dd on my macOS, and I have tried installing a Raspbian image which downloaded from the orangepi.org in Windows as well, after installation when I check free disk space it is showing:
root#orangepi:~# df -h
Filesystem Size Used Avail Use% Mounted on
rootfs 3.4G 2.7G 474M 86% /
/dev/root 3.4G 2.7G 474M 86% /
devtmpfs 374M 0 374M 0% /dev
tmpfs 101M 188K 101M 1% /run
tmpfs 5.0M 0 5.0M 0% /run/lock
tmpfs 201M 0 201M 0% /run/shm
/dev/mmcblk0p1 41M 4.9M 37M 12% /boot
I have installed it on 32G flash drive. But when I check it through fdisk command it shows 32G as a disk size:
root#orangepi:~# sudo fdisk -l
Disk /dev/mmcblk0: 32.0 GB, 32010928128 bytes
4 heads, 16 sectors/track, 976896 cylinders, total 62521344 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x34605ba5
Device Boot Start End Blocks Id System
/dev/mmcblk0p1 40960 124927 41984 83 Linux
/dev/mmcblk0p2 124928 7170047 3522560 83 Linux
root#orangepi:~#
How to fix this?
This solved my problem (solution is taken from here):
root#orangepi:~# fdisk /dev/mmcblk0
Command (m for help): p
Disk /dev/mmcblk0: 15.8 GB, 15804137472 bytes
4 heads, 16 sectors/track, 482304 cylinders, total 30867456 sectors
Units = sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disk identifier: 0x34605ba5
Device Boot Start End Blocks Id System
/dev/mmcblk0p1 40960 124927 41984 83 Linux
/dev/mmcblk0p2 124928 7170047 3522560 83 Linux
Command (m for help): d
Partition number (1-4): 2
Command (m for help): n
Partition type:
p primary (1 primary, 0 extended, 3 free)
e extended
Select (default p): p
Partition number (1-4, default 2): 2
First sector (2048-30867455, default 2048): 124928
Last sector, +sectors or +size{K,M,G} (124928-30867455, default 30867455):
Using default value 30867455
Command (m for help): w
Then quit (command q), reboot. You will then be able to use resize:
resize2fs /dev/root
In the neo4j-wrapper.conf file I see this:
# Java Heap Size: by default the Java heap size is dynamically
# calculated based on available system resources.
# Uncomment these lines to set specific initial and maximum
# heap size in MB.
#wrapper.java.initmemory=512
#wrapper.java.maxmemory=512
Does that mean that I should not worry about -Xms and -Xmx?
I've read elsewhere that -XX:ParallelGCThreads=4 -XX:+UseNUMA -XX:+UseConcMarkSweepGC would be good.
Should I add that on my Intel® Core™ i7-4770 Quad-Core Haswell 32 GB DDR3 RAM 2 x 240 GB 6 Gb/s SSD (Software-RAID 1) machine?
I would still configure it manually.
Set both to 12 GB and use the remaining 16GB for memory mapping in neo4j.properties. Try to match it to you store file sizes
I have a vagrant box that has about 6gb of disk space. How do I change this so that the vm takes up as much space as needed? I see plenty of space on my laptop:
Vagrant:
[vagrant#localhost ~]$ df
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/mapper/VolGroup-lv_root
6744840 6401512 700 100% /
tmpfs 749960 0 749960 0% /dev/shm
/dev/sda1 495844 40707 429537 9% /boot
v-root 487385240 332649828 154735412 69% /vagrant
Laptop:
~ $ df
Filesystem 512-blocks Used Available Capacity iused ifree %iused Mounted on
/dev/disk1 974770480 662925656 311332824 69% 82929705 38916603 68% /
devfs 390 390 0 100% 675 0 100% /dev
map -hosts 0 0 0 100% 0 0 100% /net
map auto_home 0 0 0 100% 0 0 100% /home
There is no way to make dynamically sized disks with virtual box as far as I am aware... They always need to have a max size even though they can be dynamically allocated.
Resizing them is also quite complicated but there are several tutorials around on the net, for example something like this should get you on the right track: http://tanmayk.wordpress.com/2011/11/02/resizing-a-virtualbox-partition/
I usually make sure that the vagrant box I choose to use or create has about 40 gigs as the size for the dynamically allocated disk.
I am trying to allocate ram with xms = xmx on a sles10 x64 running under VMware.
When stopping the JVM the following error is thrown:
Java HotSpot(TM) 64-Bit Server VM warning: Failed to reserve shared memory (errno = 12).
The RAM of the VM is 8 GB and they are reserved.
The VM sees 8GB and it can be allocated during runtime via the XMX setting.
On another Virtual SLES10 with 16 GB RAM Reserved via VMWare I don't have a problem with allocation of RAM even when setting the hugepages and shmax only by echo it works fine.
echo 8000 > /proc/sys/vm/nr_hugepages
echo 8589934592 > /proc/sys/kernel/shmmax
Using the echo commands on the other SLES10 show no effect in /proc/meminfo at all.
here are my configs 1st on is the SLES10 where XMS fails to allocate.
# more /apps/liferay-portal-5.2.5/tomcat-5.5.27/bin/setenv.sh
JAVA_HOME=/apps/java5
JRE_HOME=/apps/java5
JAVA_OPTS="$JAVA_OPTS -Xms3G -Xmx3G -XX:NewRatio=3 -XX:MaxPermSize=256m -XX:SurvivorRatio=20 -Dsun.rmi.dgc.client.gcInterval=1800000 -Dsun.rmi.dgc.server.gcInterval=1800000 -XX:+UsePa
rallelGC -XX:ParallelGCThreads=4 -XX:+UseLargePages -Xloggc:/apps/gc.log -XX:+PrintGCApplicationStoppedTime -XX:+PrintGCApplicationConcurrentTime -XX:+PrintGC -XX:+PrintGCTimeStamps -
XX:+PrintGCDetails -Dfile.encoding=UTF8 -Duser.timezone=GMT+2 -Djava.security.auth.login.config=$CATALINA_HOME/conf/jaas.config -Dorg.apache.catalina.loader.WebappClassLoader.ENABLE_C
LEAR_REFERENCES=false"
more /etc/sysctl.conf
kernel.shmmax=7516192768
vm.nr_hugepages=3072
vm.hugetlb_shm_group=1000
more /etc/securtiy/limits.conf
#
#
#* soft core 0
#* hard rss 10000
##student hard nproc 20
##faculty soft nproc 20
##faculty hard nproc 50
#ftp hard nproc 0
##student - maxlogins 4
* soft memlock unlimited
* hard memlock unlimited
tomcat soft memlock 6291456
tomcat hard memlock 6291456
# End of file
# cat /proc/meminfo
MemTotal: 7928752 kB
MemFree: 737004 kB
Buffers: 0 kB
Cached: 417368 kB
SwapCached: 0 kB
Active: 487428 kB
Inactive: 324072 kB
HighTotal: 0 kB
HighFree: 0 kB
LowTotal: 7928752 kB
LowFree: 737004 kB
SwapTotal: 2097144 kB
SwapFree: 2097020 kB
Dirty: 0 kB
Writeback: 0 kB
AnonPages: 397208 kB
Mapped: 72180 kB
Slab: 62136 kB
CommitLimit: 2915792 kB
Committed_AS: 748576 kB
PageTables: 3292 kB
VmallocTotal: 34359738367 kB
VmallocUsed: 7028 kB
VmallocChunk: 34359731271 kB
HugePages_Total: 3072
HugePages_Free: 2305
HugePages_Rsvd: 897
Hugepagesize: 2048 kB
# ipcs -l
Shared Memory Limits --------
max number of segments = 4096
max seg size (kbytes) = 7340032
max total shared memory (kbytes) = 4611686018427386880
min seg size (bytes) = 1
Semaphore Limits --------
max number of arrays = 1024
max semaphores per array = 250
max semaphores system wide = 256000
max ops per semop call = 32
semaphore max value = 32767
Messages: Limits --------
max queues system wide = 16
max size of message (bytes) = 65536
default max size of queue (bytes) = 65536
# ulimit -a
core file size (blocks, -c) 0
data seg size (kbytes, -d) unlimited
file size (blocks, -f) unlimited
pending signals (-i) 65536
max locked memory (kbytes, -l) unlimited
max memory size (kbytes, -m) unlimited
open files (-n) 1024
pipe size (512 bytes, -p) 8
POSIX message queues (bytes, -q) 819200
stack size (kbytes, -s) 8192
cpu time (seconds, -t) unlimited
max user processes (-u) 65536
virtual memory (kbytes, -v) unlimited
file locks (-x) unlimited
On the Second VM it looks like this
cat /proc/meminfo
MemTotal: 16190448 kB
MemFree: 176812 kB
Buffers: 52752 kB
Cached: 755256 kB
SwapCached: 0 kB
Active: 713808 kB
Inactive: 425300 kB
HighTotal: 0 kB
HighFree: 0 kB
LowTotal: 16190448 kB
LowFree: 176812 kB
SwapTotal: 35658896 kB
SwapFree: 35658796 kB
Dirty: 932 kB
Writeback: 0 kB
AnonPages: 333620 kB
Mapped: 79120 kB
Slab: 37492 kB
CommitLimit: 36356744 kB
Committed_AS: 646284 kB
PageTables: 3584 kB
VmallocTotal: 34359738367 kB
VmallocUsed: 23500 kB
VmallocChunk: 34359713907 kB
HugePages_Total: 7224
HugePages_Free: 6654
HugePages_Rsvd: 582
Hugepagesize: 2048 kB
JAVA_OPTS="$JAVA_OPTS -Xms2G -Xmx2G -XX:NewRatio=3 -XX:MaxPermSize=256m -XX:SurvivorRatio=20 -Dsun.rmi.dgc.client.gcInterval=1800000 -Dsun.rmi.dgc.server.gcI
nterval=1800000 -XX:+UseParallelGC -XX:ParallelGCThreads=2 -XX:+UseLargePages -Xloggc:/apps/gc.log -XX:+PrintGCApplicationStoppedTime -XX:+PrintGCApplication
ConcurrentTime -XX:+PrintGC -XX:+PrintGCTimeStamps -XX:+PrintGCDetails -Dfile.encoding=UTF8 -Duser.timezone=GMT+2 -Djava.security.auth.login.config=$CATALINA
_HOME/conf/jaas.config -Dorg.apache.catalina.loader.WebappClassLoader.ENABLE_CLEAR_REFERENCES=false"
hepide01pep1:~ # ipcs -l
------ Shared Memory Limits --------
max number of segments = 4096
max seg size (kbytes) = 8388608
max total shared memory (kbytes) = 4611686018427386880
min seg size (bytes) = 1
------ Semaphore Limits --------
max number of arrays = 1024
max semaphores per array = 250
max semaphores system wide = 256000
max ops per semop call = 32
semaphore max value = 32767
------ Messages: Limits --------
max queues system wide = 16
max size of message (bytes) = 65536
default max size of queue (bytes) = 65536
Did you tried with the less size of heap.. may be with 2gig. You can just do simple try with
java -Xmx3G -version .Let us know how it goes and what it spit out.
I have stumbled with this issue (errno 12) on CentOS 5.9 as well using 16G heaps.
After verifying hard / soft memory locks were unlimited in /etc/security/limits.conf and still getting the error, I started running java -version as suggested by Anil, with all of my JAVA_OPTS intact.
I have found that removing the "-XX:+UseLargePages" option gets rid of that error.
I hope this helps you!