Question

sp_helpdb is giving me wrong results for log size/free:

device_fragments               size          usage                created                   free kbytes      
------------------------------ ------------- -------------------- ------------------------- ---------------- 
data_device2                       1024.0 MB data only            Nov  5 2011  5:24AM                    238 
log_device1                         640.0 MB log only             Nov  5 2011  5:24AM       not applicable   
data_device1                       2048.0 MB data only            Nov  5 2011  5:24AM                 980560 
data_device1                       1024.0 MB data only            Nov  5 2011  9:41AM                1044480 
log_device1                        1024.0 MB log only             Nov  5 2011  9:41AM       not applicable   



-------------------------------------------------------------- 
log only free kbytes = 1723580                                 

---

Summing log only data size, it gives 1024+640 = 1664

But log free in mb is 1723580/1024 = 1 683.18359

---

How is it possible to have more free log space than the total size?

Sybase version:
Adaptive Server Enterprise/15.0.3/EBF 16736
ESD#2/P/Sun_svr4/OS 5.8/ase1503/2707/64-bit/FBO/Sun Jul 26 10:29:50
2009

Answer 1

just a guess but any chance these are allocated values instead of used values? Maybe your log was bigger than it was cleaned and Sybase kept the apace allocated for it. I know that SQL Server does this when increasing the DB file sizes so just a guess…