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Questions tagged [tmpfs]

69 questions
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Can't start Bind open: /etc/named.conf: permission denied

so I'm really new on this and was following this tutorial to set up bind, and up to 4:50 I was having no problems, I could ping, use nslookup and had internet connection with the dns server, then we had to add the zones and create the zone files…
Nelson SMG
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How to select Linux temp/tmp/temporary directory overflow disk

On linux, temporary files are stored on a ramdisk: tmpfs 15G 4.0K 15G 1% /dev/shm However, if there are several large files in /tmp/ I would assume that the files overflow onto disk? In such a case, if the machine has slower…
Martin
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monitor IO to tmpfs partition?

How can I monitor the write speed to a tmpfs partition. It does not appear in the output of vmstat or iostat. I am running several python processes that are writing heavily to tmpfs and contributing to load. The load is high but the CPU, memory,…
CarpeNoctem
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What is the use of /lib/init/rw in Debian?

I just installed Debian 5 (Lenny) and I noticed that /lib/init/rw is reported as a RAM Disk (tmpfs). I've only had experience with Fedora so I'm curious what function does that directory serve in Debian. Can it be used by user written shell scripts…
GeneQ
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Setting up tmpfs `/run/lock` for hundreds of thousands of 0 byte lock files, and dealing with the inode limit

I have a situation where I need to create 100s of thousands of 0 byte lock files for concurrency control. I've tested creating them by using: for i in `seq 1 50000`; do touch "/run/lock/${i}.lock"; done Since the files are 0 bytes, they don't up…
CMCDragonkai
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df shows too much space on tmpfs

I have a server (SLES 11 running on a VMware hypervisor if that matters) with a tmpfs partition meant for mysql temporary tables, and I run mysql chrooted. df -h gives me strange outpupt: root@db12.lab:~# df -h /usr/chroot/tmp/ Filesystem Size …
Roman Grazhdan
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qemu don't start quest with disk image on tmpfs

I have 32bit windows 2k3r3 guest (terminal server) with 4GB guest ram and swapping. I created separate disk image for guest swapping and user's temp dirs. I have enouth RAM in host system and want to save disk IO by moving this image to tmpfs, but…
Sergei
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Create variable sized RAM-backed file systems (Ext4 and Btrfs)

For benchmarking purposes I need to format and mount variable sized ram-backed block devices with Ext4 and Btrfs. Unfortunately the only solution I have come across uses ramdisks which seem to be inflexible (they are all the same size). The only…
Noah Watkins
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Best Way to store sessions in a High Availability / High Performance way in Multiple Server Environment

I have an application (Magento) that has an abstracted session storage layer. I'm trying to visualize the best way to store sessions. mysql Database? I'm thinking a dedicated database with a very large innodb_buffer_pool_size so its basically like…
Bryan Ruiz
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Improving Exim performance: mounting message queue on RAMdisk

I have an email server that's part of a messaging application, and it's going to see a lot of throughput. I want to mount Exim's message queue on a RAMdisk to maximize performance; throughput speed is most important, as opposed to solidarity in…
JustinP
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MySQL & tmpfs : performance

I was wondering if, and how much, using tmpfs could improve MySQL performance and how it should be done ? My guess would be to do mount -t tmpfs -o size=256M /path/to/mysql/data/DatabaseName, and to use the database normally but maybe I'm wrong (I'm…
Serty Oan
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CoreOS high RAM usage for tmpfs

I'm using the latest CoreOS AMI (ami-0fc25a0b6bd986d03 details) on a small t2.nano instance. This instance only has 500MB of memory. Unfortunately, CoreOS immediately consumes ~240MB for a tmpfs, which it then mounts at /tmp as shown below. This…
Hamy
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Is there a way to run a custom script immediately after mount a tmpfs on Linux?

I've got a tmpfs mounted to /var/something/else and I'd like to copy files to the location immediately after it's mounted. So if I run (or action executed after server reboot): mount /var/something/else mounted files synced from hdd to tmpfs a…
Alex
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Multiple tmpfs exists with total combined space more than total memory

I have a VPS with 7.5G ram running CentOS 7, and tbh I haven't done much optimizations etc as its serving the site pretty good. Today I was going to create a ramdisk for mysql temp tables, so I thought I should first check if there is any ramdisk or…
firex
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how can tmpfs larger than SHMALL parameter?

The amount of Shared memory being utilized: #> df -h /dev/shm Filesystem Size Used Avail Use% Mounted on tmpfs 125G 96G 30G 77% /dev/shm The max amount of shared memory system-wide, set by the SHMALL kernel…
Unholyburger
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