similar to: Why the huge shmmax default setting?

Hi List, I'm tuning up a new database server and I'm finding very mixed information online. Here are the default shmmax and shmall from my new system cat /proc/sys/kernel/shmmax 4294967295 cat /proc/sys/kernel/shmall 268435456 SHMALL is close enough to being SHMMAX / 16. Now, everything I'm finding online tells me that SHMALL = SHMMAX / PAGE_SIZE. default page size is 4096.

Hello, I have the following entries in /boot/loader.conf: kern.ipc.shm_use_phys="1" kern.ipc.semmns="500" kern.ipc.semmni="40" kern.ipc.semmap="500" which are set correctly. Unfortunately, the following two entries kern.ipc.shmmax="512000000" kern.ipc.shmall="65526" do not change the corresponding values according to

Chris Murphy wrote: <snip> > The emulation implementations don't come into play if the alignment is > correct from the start. The better implementations have significantly > less pathological behavior if alignment is wrong, but that's > anecdotal, I don't have any empirical data available. But I'd say in > any case you want it properly aligned. You really,

Still have good quality older sata hardware raid cards that require 512 bytes/sector. As far as I know HD manufacturers are not making native 512 bytes/sector drives any more. Some have better 512e emulation than others. Looking for some advice on which to avoid and which are recommended. Thanks. PS this is for a CentOS6 server.

Hello again, on CentOS 6 / 64 bit what is please the best way to permanently increase the shared memory? I'd like to give shared_buffers = 4096MB to PostgreSQL 8.4 on my machine with 16 GB RAM, but I currently only have: # sysctl -A|grep shm kernel.shmmax = 33554432 kernel.shmall = 2097152 kernel.shmmni = 4096 and this produces the error in /var/lib/pgsql/pgstartup.log:

Hi all Its been long time i have sending this message to this news group but i could not get proper responce from the authors or any experts that, is that bug or only the problem with my ssytem iam tryin this config with FC iptable 1.3.0 and latest TC tc utility, iproute2-ss050330 htb 3.17 iam trying past 2 weeks and digging all googles but could not able to come to conclusion whats wrong

Does anyone know of a repository that's *trustworthy* (gotta worry 'bout malware) with newer ruby rpm's than RHEL has? OT: the more I deal with ruby, the less I like it. Someone here was ready to move to a newer version, and from the ruby.org website, they're apparently actively hostile to all RH-related distros, even though we're the most common in North America. They've

Folks Just for laughs, I took an older 64-bit machine, HP Pavillion A1710N, and tried a net-install of Centos7. The installer complained that there was no network devices available. I then tried a Centos6 Netinstall disk, and it found the controller and worked fine. What should I do? I'd love to get C7 installed on it. David

I recently purchased a set of ASRock Intel i5 MB/CPU combos for a budget compute cluster. Every time we load up a system and try to boot with a recent EL6/64 ISO, we get a message that reads: > This hardware (or a combination thereof) is not supported by CentOS. For more > information on supported hardware, plesae refer to http://www.centos.org/hardware Not only does the hardware

CentOS 6.4, clean install. Zimbra 8.0.3 I am behind a PfSense box using a virtual IP. So the IP of the box is 192.168.1.27 I entered this in /etc/hosts: 127.0.0.1 localhost localhost.localdomain localhost4 localhost4.localdomain4 ::1 localhost localhost.localdomain localhost6 localhost6.localdomain6 192.168.1.27 mail mail.meowbox.me meowbox.me but `hostname -f` says: $ hostname -f

Db2 is running our of shared memory. The environment: Virtual computers running under VMware ESXi hypervisor version 5.5. Two different virtual machines, each running CentOS 5, db2 express C, and Apache/PHP and vmware tools. The machines each have 8 GB of memory, 4 processors, and a couple of hundred GB of disk space available. Everything is running on the 64 bit versions. The actual

Saw a trick today, wondering if anybody else had done/tried this? Assume you have a 1U rackmount with 4 front-accessed drive bays, and you want all four bays for a 4-disk RAID5 storage. The idea is to use an internal USB adapter and a couple of bigger USB thumb drives to install to, RAID 1 style, freeing up all your external drive bays. At first, I didn't think that a thumb drive would

Hello there, the *old* PC (Turion 64 MT-32 800MHz, 1Gb RAM) of my gf is running Windows XP, and I plan on installing a CentOS beside of it, allowing her to select the OS at boot-time. Other system/OS installing options are not retained, please avoid ;-). My first attempt was to install the CentOS7 GNOME-Live on a USB flashdisk and to boot it on the machine. It was either freezing at grub stage

On 2/17/2015 12:31 PM, Eero Volotinen wrote: > 2015-02-17 22:26 GMT+02:00 Eckert, Doug<doug.eckert at dowjones.com>: > >> >We have a DHCP/PXE server in a build environment, which is separate from >> >our Spacewalk v1.5 server. We direct builds to Satellite or Spacewalk based >> >as needed. It contains initrd & vmlinuz files for each version/arch we

Hi folks. We were made aware of a MITRE CVE assignment on OpenSSH for a remote DoS in sftp, described as: The (1) remote_glob function in sftp-glob.c and the (2) process_put function in sftp.c in OpenSSH 5.8 and earlier, as used in FreeBSD 7.3 and 8.1, NetBSD 5.0.2, OpenBSD 4.7, and other products, allow remote authenticated users to cause a denial of service (CPU and memory consumption) via

Hi all: I have some kvm host(rhel 6.4, 2.6.32-358.0.1.el6.x86_64), I ran several windows guest on it(more than 10 guest on one host and the guest os are win7-32/win7-64/win2k8), but the guest network kept down automatically, lost package. I tried virtio drive and e1000 drive,but it didn't work. However, when I run cmd.exe ping some other subnet ip it worked. The host and guest are connected by

I'm reposting this problem (perhaps a bug) now I've got more information on it. This is another point of view of the situation and I hope someone could have run into the same trouble before (and solved it :-)) This is it: * with ntbackup 2000 I create a 22Gb .bkf file in the windows machine. * I can copy that file over a samba share and get correct info form the file in windows

On 17/02/16 14:32, Michael H wrote: > Hi, re-posting this with a more appropriate subject for my reply; > >> The easy answer is yes .. glibc requires so many things to be restarted, >> that is the best bet. Or certainly the easiest. >> >> Note: in CentOS 7, there is also a kernel update which is rated as >> Important .. so you should boot to that anyway:

I'm trying to streamline a backup system using ZFS. In our situation, we're writing pg_dump files repeatedly, each file being highly similar to the previous file. Is there a file system (EG: ext4? xfs?) that, when re-writing a similar file, will write only the changed blocks and not rewrite the entire file to a new set of blocks? Assume that we're writing a 500 MB file with only

Hi, I have a customized CentOS 5.5 kernel. I want it to upgrade it to CentOS 7. The approach I have decided was to take the CentOS 7 and then install the customized packages that are there in the CentOS 5.5. While trying to install the customized packages, I could install most of the packages, but I couldn't install the below in the latest CentOS 7. 1. rhpl 2. mod_perl 3.