I am using Redhat Linux 4 as I checked space and foud that / is 100% full. Like below:
Filesystem 1K-blocks Used Available Use% Mounted on
/dev/hda3 2316536 2179008 19852 100% /
/dev/hda2 101107 9324 86562 10% /boot
/dev/hda6 1683960 70256 1528160 5% /home
none 192012 0 192012 0% /dev/shm
How to create more space on / directory? or decrease size in / directory.
Nagios had alerted me that the server had a very high load average exceeding the critical level (17+), when logging onto the server I found that all 4GB of the swap was in use despite the fact that there was 15GB+ of free memory (and that's not even including memory from cache and buffers!) Because it seems all heavily used pages were being stored in swap, the I/O wait on the server became very high, and 4 kswapd daemons were taking up nearly 100% available CPU. This did coincide with an error reported by Bacula during a backup job while changing to a bad tape...
From /var/log/bacula.log:
Code:
10-Dec 02:11 bacula-sd JobId 1898: End of medium on Volume "4097" Bytes=434,170,000,000 Blocks=217,084 at 10-Dec-2010 02:11.
10-Dec 02:11 bacula-sd JobId 1898: 3307 Issuing autochanger "unload slot 4097, drive 0" command.
10-Dec 02:12 bacula-sd JobId 1898: 3301 Issuing autochanger "loaded? drive 0" command.
10-Dec 02:12 bacula-sd JobId 1898: 3302 Autochanger "loaded? drive 0", result: nothing loaded.
10-Dec 02:12 bacula-sd JobId 1898: 3304 Issuing autochanger "load slot 4096, drive 0" command.
10-Dec 02:13 bacula-sd JobId 1898: 3305 Autochanger "load slot 4096, drive 0", status is OK.
10-Dec 02:13 bacula-sd JobId 1898: Volume "4096" previously written, moving to end of data.
10-Dec 03:51 bacula-sd JobId 1898: Error: Unable to position to end of data on device "Tape-1" (/dev/IBMtape0n): ERR=dev.c:1384 read e
rror on "Tape-1" (/dev/IBMtape0n). ERR=Input/output error.
10-Dec 03:51 bacula-sd JobId 1898: Marking Volume "4096" in Error in Catalog.
10-Dec 03:51 bacula-sd JobId 1898: 3307 Issuing autochanger "unload slot 4096, drive 0" command.
10-Dec 03:58 bacula-sd JobId 1898: 3301 Issuing autochanger "loaded? drive 0" command.
10-Dec 03:58 bacula-sd JobId 1898: 3302 Autochanger "loaded? drive 0", result: nothing loaded.
10-Dec 03:58 bacula-sd JobId 1898: 3304 Issuing autochanger "load slot 4098, drive 0" command.
10-Dec 03:58 bacula-sd JobId 1898: 3305 Autochanger "load slot 4098, drive 0", status is OK.
10-Dec 03:59 bacula-sd JobId 1898: Wrote label to prelabeled Volume "4098" on device "Tape-1" (/dev/IBMtape0n)
10-Dec 03:59 bacula-sd JobId 1898: New volume "4098" mounted on device "Tape-1" (/dev/IBMtape0n) at 10-Dec-2010 03:59.
At the same time, these messages starting occuring in /var/log/messages:
Code:
Dec 10 03:51:47 07 kernel: Mem-info:
Dec 10 03:51:47 07 kernel: Node 0 DMA per-cpu:
Dec 10 03:51:47 07 kernel: cpu 0 hot: high 0, batch 1 used:0
Dec 10 03:51:47 07 kernel: cpu 0 cold: high 0, batch 1 used:0
Dec 10 03:51:47 07 kernel: cpu 1 hot: high 0, batch 1 used:0
Dec 10 03:51:47 07 kernel: cpu 1 cold: high 0, batch 1 used:0
Dec 10 03:51:47 07 kernel: cpu 2 hot: high 0, batch 1 used:0
Dec 10 03:51:47 07 kernel: cpu 2 cold: high 0, batch 1 used:0
Dec 10 03:51:47 07 kernel: cpu 3 hot: high 0, batch 1 used:0
Dec 10 03:51:47 07 kernel: cpu 3 cold: high 0, batch 1 used:0
Dec 10 03:51:47 07 kernel: cpu 4 hot: high 0, batch 1 used:0
Dec 10 03:51:47 07 kernel: cpu 4 cold: high 0, batch 1 used:0
Dec 10 03:51:47 07 kernel: cpu 5 hot: high 0, batch 1 used:0
Dec 10 03:51:47 07 kernel: cpu 5 cold: high 0, batch 1 used:0
Dec 10 03:51:47 07 kernel: cpu 6 hot: high 0, batch 1 used:0
Dec 10 03:51:47 07 kernel: cpu 6 cold: high 0, batch 1 used:0
Dec 10 03:51:47 07 kernel: cpu 7 hot: high 0, batch 1 used:0
Dec 10 03:51:47 07 kernel: cpu 7 cold: high 0, batch 1 used:0
Dec 10 03:51:47 07 kernel: Node 0 DMA32 per-cpu:
Dec 10 03:51:47 07 kernel: cpu 0 hot: high 186, batch 31 used:162
Dec 10 03:51:47 07 kernel: cpu 0 cold: high 62, batch 15 used:48
Dec 10 03:51:47 07 kernel: cpu 1 hot: high 186, batch 31 used:0
Dec 10 03:51:47 07 kernel: cpu 1 cold: high 62, batch 15 used:0
Dec 10 03:51:47 07 kernel: cpu 2 hot: high 186, batch 31 used:0
Dec 10 03:51:47 07 kernel: cpu 2 cold: high 62, batch 15 used:0
Dec 10 03:51:47 07 kernel: cpu 3 hot: high 186, batch 31 used:18
Dec 10 03:51:47 07 kernel: cpu 3 cold: high 62, batch 15 used:0
Dec 10 03:51:47 07 kernel: cpu 4 hot: high 186, batch 31 used:159
Dec 10 03:51:47 07 kernel: cpu 4 cold: high 62, batch 15 used:56
...
Dec 10 03:51:47 07 kernel: Node 3 HighMem per-cpu: empty
Dec 10 03:51:47 07 kernel: Free pages: 732052kB (0kB HighMem)
Dec 10 03:51:47 07 kernel: Active:4232128 inactive:3071288 dirty:158210 writeback:0 unstable:0 free:183320 slab:256840 mapped-file:289545 mapped-anon:3805487 pagetables:13063
Dec 10 03:51:47 07 kernel: Node 0 DMA free:10796kB min:4kB low:4kB high:4kB active:0kB inactive:0kB present:10356kB pages_scanned:0 all_unreclaimable? yes
Dec 10 03:51:47 07 kernel: lowmem_reserve[]: 0 3512 9067 9067
Dec 10 03:51:47 07 kernel: Node 0 DMA32 free:213332kB min:2500kB low:3124kB high:3748kB active:1794108kB inactive:1463220kB present:3596296kB pages_scanned:64 all_unreclaimable? no
Dec 10 03:51:47 07 kernel: lowmem_reserve[]: 0 0 5555 5555
Dec 10 03:51:47 07 kernel: Node 0 Normal free:41028kB min:3952kB low:4940kB high:5928kB active:3409444kB inactive:1471120kB present:5688320kB pages_scanned:0 all_unreclaimable? no
Dec 10 03:51:47 07 kernel: lowmem_reserve[]: 0 0 0 0
Dec 10 03:51:47 07 kernel: Node 0 HighMem free:0kB min:128kB low:128kB high:128kB active:0kB inactive:0kB present:0kB pages_scanned:0 all_unreclaimable? no
Dec 10 03:51:47 07 kernel: lowmem_reserve[]: 0 0 0 0
Dec 10 03:51:47 07 kernel: Node 1 DMA free:0kB min:0kB low:0kB high:0kB active:0kB inactive:0kB present:0kB pages_scanned:0 all_unreclaimable? no
...
Well to cut a long story short, I fixed the problem by disabling the swap partition with 'swapoff'. After about 30 mins all the swap was freed and the server went back to normal. I don't dare reactivate the swap partition and unfortunately as this is a live server which currently has no fail over, I can't reboot either
Server Spec:
4 * Dual-Core AMD Opteron(tm) Processor 8214
32GB DDR2 ECC RAM
RHEL 5.5, 2.6.18-194.11.3.el5 SMP x86_64
Running many KVM VMs (All CentOS x64) and kksmd is used.
bacula-dir Version: 5.0.0
IBM Tape Drive using lin_tape module version 1.34.0 according to modinfo
And before anybody asks
# sysctl vm.swappiness
vm.swappiness = 10
So... I run df -h and I get this:
Filesystem Size Used Avail Use% Mounted on
/dev/root 293G 21G 258G 8% /
tmpfs 503M 0 503M 0% /dev/shm
/dev/hdd1 113G 12G 96G 11% /win1
/dev/hdc1 113G 109G 0 100% /win0
It's close to full, but not actually full. I can't run a lot of things on this drive because the programs complain that they have no space.
I've got a question on free disk space. I'm currently running CentOS 5.5 on in Xenserver virtual environment. We've had an issue with disk space. My question is as follows: - from a ssh connection i run df -h this gives the value of 90% used leaving me with 9GB. If I use system monitor via a VNC connection the free disk space value is 20GB free on the same volume. Which one is correct? I do use SNMP to monitor the same volume and should alert me when < 10% is free I know this works as I set the alert threshold to < 90% I get an alert.
View 2 Replies View RelatedI have 160gb laptop. i installed vista in c primary partition which is 25gb and installed ubuntu in d primary partition which is 20gb. A remainig for my data. Now i tried to install CENT OS by formatting ubuntu. I inserted CENT OS DVD and restarted and i selected to delete my /dev/sda2 which is showing 20480mb and it shown me free space. but i tried to add partion /boot of 100mb it got added. but, when i am trying to add / of 3000mb in the remaining 20380mb free space it showing an error message that no free space is available.
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[Code]...
If I use a * as a wildcard for the number extension, the script fails. Maybe regex would work here, but I'm not particularly accomplished at it. Or some other construct.
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I try 'rm' various log files but the space I free up lasts less than a minute before the disk reports as being full once more.
df -Th | sort gives:
Quote:
/dev/sda1 ext3 8.3G 7.9G 0 100% /
/dev/sda6 ext3 138G 125G 6.3G 96% /music
/dev/sda7 xfs 783G 617G 167G 79% /videos
/dev/sdb2 xfs 344G 242G 103G 71% /recordings
[Code]....
There's nothing enormous in /var/log and my trash and the root trash are empty.
why size and used fields are not the same despite 100% usage being reported on sda1..
I have a server running CentOS 5.3 (Final) Kernel version is:
2.6.18-128.el5 #1 SMP Wed Jan 21 10:44:23 EST 2009 i686 athlon i386 GNU/Linux
The output from df -h is as follows:
Filesystem Size Used Avail Use% Mounted on
/dev/sda2 9.5G 3.7G 5.4G 41% /
/dev/sda5 4.6G 456M 3.9G 11% /var
[code]....
As you can see, /home claims to be 100% full - but yet there is actually 18Gb free? I seem to recall this could be something to do with running out of inode space?
I have a RHEL server and it's /boot only has 7MB free space on it, 122MB total size. Below is what's in the folder.Is there anything i should do to clean it up?
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Each time I allocate more space for root. My current partition is 65G in size. The raid shows only 5.1TB of space used and it shows 7.2TB of free space. The raid share shows as being mounted in /media. Root shows that it will be full at 5.2TB, and I'm almost there, so I'm probably looking at another install in just a short while when it freezes again. I've read reinstall and make a larger root partition, but I'm not sure how big that must be to avoid this problem in the future. Also, is there a limitation on the size that root can be? my question stems from the fact that I have over 7TB of free space but somehow the root is reporting as 100% full at only to 5.1TB.
just some time ago, my /usr partition's used space is started to increase rapidly, and currently it reached 17.5GB. We put /usr as a separate partition (/dev/sda2)
So when we do "df" this is the result:
Code:
#df
...
/dev/sda2 20315844 17612628 1654576 92% /usr
...
But what makes me puzzled is if I do "du", I only get 4.3GB instead of 20GB as "df" reported.
Code:
# du -csh /usr
4.3G /usr
4.3G total
So I'm missing approx 13GB here. My question is:where does my 13GB missing?
[root@linux root]# fdisk -l
Disk /dev/hda: 40.0 GB, 40020664320 bytes
255 heads, 63 sectors/track, 4865 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes
Device Boot Start End Blocks Id System
/dev/hda1 * 1 13 104391 83 Linux
/dev/hda2 1276 4864 28828642+ f Win95 Ext'd (LBA)
/dev/hda3 14 395 3068415 83 Linux
/dev/hda4 396 526 1052257+ 82 Linux swap
/dev/hda5 1276 3187 15358108+ 7 HPFS/NTFS
/dev/hda6 3188 3249 497983+ 8e Linux LVM
/dev/hda7 3250 3311 497983+ 8e Linux LVM
Here /dev/hda5 taken of How much capacity for NTFS (need space in MB).
Why linux uses swap space, even if there are free physical memory available.
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Result from df:
[root@LSMSVR ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/VolGroup00-LogVol00
1.2G 269M 879M 24% /
/dev/hda6 4.8G 138M 4.4G 4% /tmp
/dev/hda5 19G 2.4G 16G 14% /usr
/dev/hda3 48G 12G 34G 25% /var
/dev/hda2 379G 365G 0 100% /home
/dev/hda1 99M 15M 80M 16% /boot
tmpfs 180M 0 180M 0% /dev/shm
ow to recover the lost space in /home?
Wierd problem, when I map a Windows Drive to my Ubuntu HTPC Samba share, Windows reports the free space as the free space on my root partition?!!?
HTPC Ubuntu server:
df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sda2 12G 6.5G 4.0G 62% /udev 1.6G 308K 1.6G 1% /dev
[code]....
So my root partition has 4gb free, and my samba share (/mnt/data) has 97gb free.
From Windows machine:
net use
Status Local Remote Network
-------------------------------------------------------------------
OK Z: \xbmcfiles MS Windows Network
[code]....
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Code:
Usage of /: 93.8% of 35.76 GB
so I used df -hl for query detail and system showed
Code:
Filesystem Size Used Avail Used% Mounted on
/home/myuser/.Private 36G 34G 501M 99% /home/myuser
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