Hi Maxime

I have been able to recreate and we are looking into this ...

Best Regards
Hugh Williams
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On 20 Sep 2011, at 14:57, Maxime Teissèdre wrote:

> Hello,
> 
> To monitor and graph value from virtuoso we decided to use the command 
> "select sys_stat ()";
> We did some tests gathering buffers values (st_db_buffers st_db_used_buffers 
> st_db_dirty_buffers st_db_wired_buffers) each 10 seconds, we noted during 
> several tens of second that the values weren't updated, it seems there where 
> cached or not updated.
> After we ran some test with status(); and the same values were updated more 
> regularly.
> 
> Finally, we did a test where we run "select sys_stat ()" several times, and 
> after we run "status ();" command, we discovered that coincidently, values 
> returned by "sys_stat ();" were updated after the "status ()" .
> 
> So my questions are:
> * is there some caching done somewhere when calling "select sys_stat ()" ?
> * does "status();" bypass or invalid this cache ?
> * is a way to bypass the cache when using "select sys_stat ()" ?
> 
> Could you enlighten us on that part ?
> 
> We use VOS 6.1.3.
> 
> Regards.
> 
> Maxime T.
> 
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