similar to: Understanding iostat

Hello, We are planning to moving most of our servers to ESX but before buying our SAN, we want to do some I/O stats to see if iSCSI is enough or if we have to go with FC. So I found a plugin for Nagios that can log I/O stats with iostat. So far it's fine with single disk/one partition servers, but on our Oracle Database 10g server, we have two drives in RAID 1 (/dev/sda) and 4 other

Hello, When approaching hosting providers for services, the first question many of them asked us was about the amount of IOPS the disk system should support. While we stress-tested our service, we recorded between 4000 and 6000 "merged io operations per second" as seen in "iostat -x" and collectd (varies between the different components of the system, we have a few such

I updated an i386 system to b39 yesterday, and noticed this when running iostat: r/s w/s kr/s kw/s wait actv wsvc_t asvc_t %w %b device 0.0 0.5 0.0 10.0 0.0 0.0 0.0 0.5 0 0 c0t0d0 0.0 0.5 0.0 10.0 0.0 0.0 0.0 0.6 0 0 c0t1d0 0.0 65.1 0.0 119640001.5 0.0 0.0 0.0 0.3 0 2 c0t2d0 0.0 65.1 0.0 119640090.2 0.0

Does "bwlimit" option really work on rsync locally? We have one type of harddisk and want to slow down rsync I/O on disk because I don't want the disk head gets too hot. While I'm trying to use --bwlimit option, it looks the rsync speed was slowed down, but iostat is not improved at all. In both case the block written speed is increased by the same amount. How could I really

on Solaris 10 5.10 Generic_118822-23 sun4v sparc SUNW,Sun-Fire-T200 I run #iostat -xn 5 to monitor the IO statistics on SF T2000 server. The system also have a heavy IO load, for some reason iostat donot refresh (no any update). It seems like iostat is calling pause() and stucked there. Also my HBA driver''s interrupt stack trace indicates there is a lot of swtch(), the overall IOPS

What is the best way to tell if your bound by the number of individual operations per second / random io? "zpool iostat" has an "operations" column but this doesn''t really tell me if my disks are saturated. Traditional "iostat" doesn''t seem to be the greatest place to look when utilizing zfs. Thanks, Chris -------------- next part -------------- An

I?ve posted this on the forums at https://www.centos.org/forums/viewtopic.php?f=47&t=57926&p=244614#p244614 - posting to the list in the hopes of getting more eyeballs on it. We have a cluster of 23 HP DL380p Gen8 hosts running Kafka. Basic specs: 2x E5-2650 128 GB RAM 12 x 4 TB 7200 RPM SATA drives connected to an HP H220 HBA Dual port 10 GB NIC The drives are configured as one large

It was found that the software NIC team created in Centos was having issues due to a failing network cable. The team was going berserk with up/down changes. On Fri, Jul 3, 2020 at 10:12 AM Erick Perez - Quadrian Enterprises < eperez at quadrianweb.com> wrote: > Hey! > I have a strange condition in one of the servers that I don't where to > start looking. > I login to the

Hi Erick, what was the value of 'si' in top ? Best Regards, Strahil Nikolov ?? 3 ??? 2020 ?. 18:48:30 GMT+03:00, Erick Perez - Quadrian Enterprises <eperez at quadrianweb.com> ??????: >It was found that the software NIC team created in Centos was having >issues due to a failing network cable. The team was going berserk with >up/down changes. > > >On Fri, Jul 3,

Hey! I have a strange condition in one of the servers that I don't where to start looking. I login to the server via SSH (cant doit any other way) and anything that I type is slow HTTP sessions timeout waiting for screen redraw. So, the server is acting "slow". server is bare metal. no virtual services. no alarms in the disk raid note: server was restarted because of power failure.

Dear all, I have installed DRBD 8.3.11 compiled from sources. However the backend block will freeze if there is high IO load. I use Remus to support high availability and checkpointing is controlled by remus for each 400ms. If I check the Iostat I got the idle CPU will decreasing extremely each checkpointing and when its reach 0% of idle cpu the local backing device will freeze and damage the

Author: petede Repository: /hg/zfs-crypto/gate Revision: ef5d30f0abff39691966b9805b895f3c757b5a9f Log message: 6269165 misleading comments in usr/src/cmd/stat/iostat/iostat.c 6286482 remove the only occurrence of "shit" in OpenSolaris 6231501 Typo in <sys/fem.h> Contributed by Shawn Walker <binarycrusader at gmail.com>. Files: update: usr/src/cmd/stat/iostat/iostat.c

Issue: Vista reads slowly from a samba server. This appears to pop up periodically here and elsewhere. My samba.conf file has: [homes] ... vfs objects = readahead As suggested elsewhere. Writes are approximately 17-18MB/s which is acceptable. Reads are in the 8MB/s range which is appalingly slow. Using linux smbclient and windows XP clients I can read at 25+MB/s. I've enabled vfs

I''m trying to write a SLAMD (http://www.slamd.com/) resource monitor that can be used to measure the I/O throughput on a ZFS pool, and in particular to be able to get the read and write rates. In order to do this, I''m basically executing "zpool iostat {interval}" and parsing the output to capture the values in the "bandwidth read" and "bandwidth

Running -STABLE from May 15th, if I do an 'ls /usr', it works ... if I do an 'ls /vm', it hangs .. the machine doesn't hang, as far as I can tell, all the web sites are accessible, and there are no errors in /var/log/messages .. I have soft-updates disabled on that file system, and iostat is showing the drive array to be quite idle: tty da0 pass0

Hi All, I am learning iostat command to understand disk I/O statistics. We have 2 Centos 4 servers running where oracle is installed.We installed them 2 weeks ago. @ that time, These Servers performed well. But, Now We have come to know that these 2 Machines are quite slow when comparing to the first week. So, Some say, run iostat to see statictics. I am not familiar with comamnd well. I

Hi gurus, I like zpool iostat and I like system monitoring, so I setup a script within sma to let me get the zpool iostat figures through snmp. The problem is that as zpool iostat is only run once for each snmp query, it always reports a static set of figures, like so: root at exodus:snmp # zpool iostat -v capacity operations bandwidth pool used avail read

I would like zpool iostat to take a "-p" option to output parsable statistics with absolute counters/figures that for example could be fed to MRTG, RRD, et al. The "zpool iostat [-v] POOL 60 [N]" is great for humans but not very api-friendly; N=2 is a bit overkill and unreliable. Is this info available in kstat, or is this an RFE candidate? In Solaris10? Ditto for zpool

OK.? That is interesting.? I am assuming tps is transfers per sec? I would have to get a stop watch, but it seems to go a bit of time, and then a write. Is there something that would accumulate this and give me a summary over some period of time?? Of course it better NOT be doing its own IOs... On 11/10/19 6:03 PM, shimi wrote: > iostat 1 > > On Mon, 11 Nov 2019, 00:11 Robert

Hi, I'm a newbie to tool 'iostat' and I've read the manual for iostat several times. But it doesn't help. I still get confused with the output of 'iostat', the manual seems too abstract, or high-level, for me. Let's post the output first: avg-cpu: %user %nice %sys %idle 5.70 0.00 3.15 91.15 Device: rrqm/s wrqm/s r/s w/s