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Full Discussion: No Paging Space Available
Operating Systems AIX No Paging Space Available Post 302867859 by tugger on Friday 25th of October 2013 06:39:25 AM
Old 10-25-2013
No Paging Space Available

Whilst perfoming some tests on lvm's I managed to crash our test box. No real problem as it is only used by our tech team.

however I would like to know why this was actually caused as the task being performed at the time was one which I though would not have any impact.

Using dd I was creating 10 x 2gb files. The filesystem these were being created in was 200gb in size and had 99% free.

The errors I got before the system became unresponsive where:

stdout:
Code:
dd: 0511-051 The read failed.
: There is not enough space in the file system.

errpt:
Code:
8527F6F4   1024165613 P S SYSVMM         NO PAGING SPACE AVAILABLE

The script being run was quite a simple script, which performed a count (to 10) and for each count it wrote a file to a filesystem:

Code:
nohup time dd if=/dev/zero of=/filesystem/file_$count bs=512m count=4 &


The system has 10GB of Memory and a pagespace of 2G. Why would the dd cause the system to become unresponsive?

Moderator's Comments:
Mod Comment edit by bakunin: please use CODE-tags for terminal output, code and data. Thank you.

Last edited by bakunin; 10-25-2013 at 09:03 AM..
 

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VGMERGE(8)						      System Manager's Manual							VGMERGE(8)

NAME
vgmerge - merge two volume groups SYNOPSIS
vgmerge [-A|--autobackup {y|n}] [-d|--debug] [-h|-?|--help] [-l|--list] [-t|--test] [-v|--verbose] DestinationVolumeGroupName SourceVol- umeGroupName DESCRIPTION
vgmerge merges two existing volume groups. The inactive SourceVolumeGroupName will be merged into the DestinationVolumeGroupName if physi- cal extent sizes are equal and physical and logical volume summaries of both volume groups fit into DestinationVolumeGroupName's limits. OPTIONS
See lvm(8) for common options. -l, --list Display merged DestinationVolumeGroupName like vgdisplay -v. -t, --test Do a test run WITHOUT making any real changes. Examples Merge the inactive volume group named "my_vg" into the active or inactive volume group named "databases" giving verbose runtime informa- tion: vgmerge -v databases my_vg SEE ALSO
lvm(8), vgcreate(8), vgextend(8), vgreduce(8) Sistina Software UK LVM TOOLS 2.02.105(2)-RHEL7 (2014-03-26) VGMERGE(8)
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