[hobbit] Re: Disk I/O check for Linux (addendum, "cpu_wait")

Stephen Stephen.Mullin at usa.net
Wed Oct 29 20:11:00 CET 2008


Linux host which sents "cpu_wait" works, HPUX doesn't send that.
( I've HPUX, SuSE, Tru64 )

# rrdtool dump ../alfpa01/vmstat.rrd |grep name
                <name> cpu_r </name>
                <name> cpu_b </name>
                <name> cpu_w </name>
                <name> mem_swpd </name>
                <name> mem_free </name>
                <name> mem_buff </name>
                <name> mem_cach </name>
                <name> mem_si </name>
                <name> mem_so </name>
                <name> dsk_bi </name>
                <name> dsk_bo </name>
                <name> cpu_int </name>
                <name> cpu_csw </name>
                <name> cpu_usr </name>
                <name> cpu_sys </name>
                <name> cpu_idl </name>
              *  <name> cpu_wait </name>*
 #

Stephen wrote:
> I've found HPUX clients don't report some elements and this breaks 
> hobbitgraph... so....
> use rrdtool dump {hosts rrd vmstat file path]  to see what's collected 
> and compare to the hard defs in hobbitgraph.cfg
>
> =================================
> Keith Meserole wrote:
>> Anyone have any thoughts?
>>
>> ------------------------------------------------------------------------
>> *From:* Keith Meserole [mailto:km at keithm.us]
>> *Sent:* Tuesday, October 14, 2008 9:07 PM
>> *To:* hobbit at hswn.dk
>> *Subject:* RE: [hobbit] Re: Disk I/O check for Linux
>>
>> Hi,
>>  
>> I gave this a try and the vmstat items show up only as objects and 
>> not graphs.   Part of the host entry is below for this host.
>>
>> I am sure I am missing something really easy.   Any ideas?
>>  
>> ------------------------------------------------------------------------
>>  
>>
>> TRENDS:*,apache:apache|apache1|apache2|apache3,vmstat:vmstat1|vmstat5  
>>  
>>  
>> ------------------------------------------------------------------------
>> *From:* RaAL at sm-shoemart.com [mailto:RaAL at sm-shoemart.com]
>> *Sent:* Monday, October 13, 2008 7:31 PM
>> *To:* Henrik Stoerner
>> *Cc:* hobbit at hswn.dk
>> *Subject:* [hobbit] Re: Disk I/O check for Linux
>>
>>
>> Hi Henrik,
>>
>> Thanks, it works .. maybe it will be more comprehensive and 
>> impressive if it will give graphical I/O stat per filesystem ?
>>
>> <<..>>
>>
>> Raymund A. Layoso
>> Jr. System Administrator
>> Technical Support Group - Information Technology Services
>> SM Retail Inc.
>> SM Corporate Office, Bldg D
>> 1000 Bay Boulevard, SM Central Business Park
>> Bay City, Pasay City 1300
>>
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>>
>>
>> *Henrik Stoerner <henrik at hswn.dk>*
>>
>> 10/14/2008 04:34 AM
>>
>> 	
>> To
>> 	RaAL at sm-shoemart.com
>> cc
>> 	
>> Subject
>> 	Re: Disk I/O check for Linux
>>
>>
>>
>> 	
>>
>>
>>
>>
>>
>> Hi,
>>
>> the Hobbit mailing list - hobbit at hswn.dk - really is the best place for
>> support questions.
>>
>> The only I/O measurement built into Hobbit is the data collected from
>> "vmstat", which gives you an overall measure of the amount of time
>> spent waiting for disk I/O. This graph is not displayed by default;
>> you can make them appear on the "trends" page by adding
>>   TRENDS:*,vmstat:vmstat1|vmstat5
>> to each of the host entries in bb-hosts. That will give you a "CPU
>> utilisation" graph that includes the I/O wait time, and a "Block I/O"
>> graph showing the number of blocks read from/written to a disk device.
>>
>>
>> Regards,
>> Henrik
>>
>>
>> On Tue, Oct 14, 2008 at 04:01:29AM +0800, RaAL at sm-shoemart.com wrote:
>> > Is there any scripts in hobbit that monitors disk I/O performance in 
>> linux
>> > box ? and with graphical presentation ?
>> > Can you help me on this since we are now having an issue with disk I/O
>> > performance in our Oracle servers ?
>>




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