Well, I have tried the --no-cache in exactly the same place as you and it did not help
I found this when I recompiled and set the use_rrd_cache = 0;
After recompiling, setting use_rrd_cache to 0 still started caching and is still giving me holes.
gcc -g -O2 -Wall -Wno-unused -D_REENTRANT -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64 -DLINUX -I. -I/home/hobbit_org/source/xymon-4.3.0-beta2/include -I/usr/include -I/usr/include -I/usr/include -c -o do_rrd.o do_rrd.c
rrd/do_iostat.c: In function âdo_iostatdisk_rrdâ:
rrd/do_iostat.c:74: warning: âidâ may be used uninitialized in this function
gcc -o hobbitd_rrd -Wl,--rpath,/usr/lib -Wl,--rpath,/usr/lib -Wl,--rpath,/usr/lib -Wl,--rpath,/usr/lib hobbitd_rrd.o
I am compling on a 32-bin linux RHEL5 system, can this be the source of my issues?
Tom
-----Original Message-----
From: Dominique Frise [mailto:user-78ab6673b600@xymon.invalid] Sent: Friday, November 20, 2009 12:24 AM
To: user-ae9b8668bcde@xymon.invalid
Subject: Re: [hobbit] Question about using no-cache on rrd for xymon 4.3.0.0.beta-2
Stewart, Tom L. wrote:
It has been almost a week and no-one has answered my question about turning off caching in the latest xymon code
I checked the source code and my -no-cache flag seems to be correct, but the caching is continuing and is causing holes ( no update for a five minute period) in the rrd files. I also found where -no-cache is set within do_rrd.c and hobbitd_rrd.c, so I am assuming that there is a bug here that does not turn off caching using the -no-cache flag.
So for a temporary fix, can I just set:
do_rrd.c:int use_rrd_cache = 1; /* Use the cache by default */
to
do_rrd.c:int use_rrd_cache = 0; /* Don't use the cache by default */
recompile and move the binary over or would I be wasting my time as the caching would still continue?
Tom
*From:* Stewart, Tom L. [mailto:user-f210f371749e@xymon.invalid]
*Sent:* Friday, November 13, 2009 3:19 PM
*To:* user-ae9b8668bcde@xymon.invalid
*Subject:* [hobbit] Question about using no-cache on rrd for xymon 4.3.0.0.beta-2
We are having issues with rrd leaving 5-10 minute intervals of no data for items such as cpu load on various systems. Most of the time it happens three times in a row like at 2, 3 and 4 pm. I am not finding anything is the logs on either the client or server. Some googling indicated that the issue may go away by using the no-cache option for RRD. I have added it to the hobbitlaunch.cfg as such:
hobbitlaunch.cfg: CMD hobbitd_channel --channel=status --log=$BBSERVERLOGS/rrd-status.log hobbitd_rrd --no-cache --extra-tests=cpucisco,ifaload,ifload,vload,wphlstat,wperrors --extra-script=/home/xymon/server/ext/extra-rrd.pl --rrddir=$BBVAR/rrd
hobbitlaunch.cfg: CMD hobbitd_channel --channel=data --log=$BBSERVERLOGS/rrd-data.log hobbitd_rrd --no-cache --extra-tests=mpstat,zonestat --extra-script=/home/xymon/server/ext/rrd_data.pl --rrddir=$BBVAR/rrd
This is on a 32 bit red hat system and when I do a ps -ef | grep rrd I show the following:
xymon 7635 7599 0 14:26 ? 00:00:01 hobbitd_channel --channel=status --log=/home/xymon/logs/rrd-status.log hobbitd_rrd --no-cache --extra-tests=cpucisco,ifaload,ifload,vload,wphlstat,wperrors --extra-script=/home/xymon/server/ext/extra-rrd.pl --rrddir=/home/xymon/data/rrd
xymon 7636 7599 0 14:26 ? 00:00:00 hobbitd_channel --channel=data --log=/home/xymon/logs/rrd-data.log hobbitd_rrd --no-cache --extra-tests=mpstat,zonestat --extra-script=/home/xymon/server/ext/rrd_data.pl --rrddir=/home/xymon/data/rrd
xymon 7672 7635 0 14:26 ? 00:00:07 hobbitd_rrd --no-cache --extra-tests=cpucisco,ifaload,ifload,vload,wphlstat,wperrors --extra-script=/home/xymon/server/ext/extra-rrd.pl --rrddir=/home/xymon/data/rrd
xymon 7681 7636 0 14:26 ? 00:00:03 hobbitd_rrd --no-cache --extra-tests=mpstat,zonestat --extra-script=/home/xymon/server/ext/rrd_data.pl --rrddir=/home/xymon/data/rrd
So it looks like it is in effect, but looking at the tmp file I still see the following:
srw-rw-rw- 1 xymon xymon 0 Nov 13 14:26 rrdctl.7672
srw-rw-rw- 1 xymon xymon 0 Nov 13 14:26 rrdctl.7681
When I stop and restart xymon I still get messages such as:
rrd-status.log:2009-11-13 14:26:09 Cache flush completed
rrd-status.log:2009-11-13 14:26:18 Peer not up, flushing message queue
So my question is have I placed the -no-cache in the wrong sequence on the startup command or is that been taken out of beta-2?
Thank you,
Tom
Hi,
--no-cache together with Xymon 4.3.0-beta2 works for us.
We use it for status and channel like this:
hobbitlaunch.cfg: CMD hobbitd_channel --channel=status --log=$BBSERVERLOGS/rrd-status.log hobbitd_rrd --no-cache --extra-tests=zfs --extra-script=/soft/pub/BB/hobbit/server/ext/rrd-status.sh --rrddir=$BBVAR/rrd
hobbitlaunch.cfg: CMD hobbitd_channel --channel=data --log=$BBSERVERLOGS/rrd-data.log hobbitd_rrd --no-cache --extra-tests=zone --extra-script=/soft/pub/BB/hobbit/server/ext/rrd-data.sh --rrddir=$BBVAR/rrd
Dominique