Timer Job Interval Issue

[SRGould41]

Hello,

We have a WSS 3 farm that has two WFE's. We use DocAve for backups. For some
time now I have been fighting backup failures because of timer job intervals.
Here is a representative error:
--
The job failed when backing up the site collection
"http://site1-sharepoint".
The interval between two jobs is longer than change log setting of this web
application.
Current Change Log Setting:90.00:00:00
Current Interval between Two Jobs:103.23:59:54.8959820
Last Job Backup Time:7/16/2009 6:00:46 PM
Current Job Backup Time:10/28/2009 6:00:41 PM
--

What I have been doing is to keep increasing the change log setting, but the
interval between jobs just keeps growing longer by the day. I don't want to
keep
increasing the change log setting every time this happens. We started at 10
days and are now at 90. This DOES solve the backup failure, but the only way
to fix it permenantly would be to never delete entries in the change log. I
don't want to do that if I dno't have to.

I have been hunting for information on how to resolve this, but without
concrete results. I have read lots of information about timer jobs, but
nothing to help me find out what jobs are causing this issue.

Looking at the timer job status page I see current dates for one WFE and
August dates for the other WFE. As of this morning the interval between two
jobs has grown to 110 days. The August date isn't 110 days back so this
doesn't seem to point at the error. Are there hidden jobs not reflected on
this page? Today I disabled the timer service on the server with the current
dates and I see the other server entries being updated as timer events fire
off.

I thought I could get all the system timer jobs to launch using
execadmsvcjobs, but that didn't do it. I will see what happens in another day
when the timer jobs run on their own schedule and then see if the backup
errors continue.

In the mean time can someone point me in the right direction? Is there a way
to figure out which jobs are causing the errors?

Thanks in advance

Steve

[SRGould41]

All the timer jobs ran so both WFE's are up to date. It made no difference to
the issue though.