Betr.: Re: Betr.: Re: Very poor performance of sapdb

2005-11-18 Thread B . Lubberdink
ECTED] backup]# time cp testfile.tmp /database/ real1m0.744s user0m0.170s sys 0m14.490s "Simon Matter" <[EMAIL PROTECTED]> 18-11-2005 13:00 Aan:[EMAIL PROTECTED] cc: maxdb@lists.mysql.com Onderwerp: Re: Betr.: Re: Very poor

Betr.: Re: Betr.: Re: Very poor performance of sapdb

2005-11-18 Thread B . Lubberdink
]>, maxdb@lists.mysql.com Onderwerp: Re: Betr.: Re: Very poor performance of sapdb Have you check the memory configuration under LILO? I had same problem when I upgraded my server from 512MB of RAM to 4GB There is a problem with some motherboard, and Linux doesn't use memory fine. I solved my pr

Re: Betr.: Re: Very poor performance of sapdb

2005-11-18 Thread Simon Matter
> Hello Simon, > > Both raid controllers are brand new and working with cache. Well, brand new doesn't mean the cache is working in write-back mode. If the battery voltage is too low, the controller puts the cache in write-trough mode until the capacity of the batteries is on the safe side. So, re

Re: Betr.: Re: Very poor performance of sapdb

2005-11-18 Thread Cristiano Caruso
Have you check the memory configuration under LILO? I had same problem when I upgraded my server from 512MB of RAM to 4GB There is a problem with some motherboard, and Linux doesn't use memory fine. I solved my problem adding "mem=3360M" in /etc/lilo.conf I never had the time to test if it works a

Re: Betr.: Re: Very poor performance of sapdb

2005-11-18 Thread Florian Schmitz
Are you using different type of raids? How is the Disk-Set-Up? What type of FS? Raw-Devices? We are completly satisfied with performance on Smart-Array-Controllers. (5i/6i, all 15krpm SCSI) Florian Schmitz __ acardo technologies AG Königswall 18a 44137 Dortmund fon: +49 (0)

Betr.: Re: Very poor performance of sapdb

2005-11-18 Thread B . Lubberdink
Hello Simon, Both raid controllers are brand new and working with cache. We use RedHat AS3 and when looking with the dset utility, the DELL server transferes aprox 35M/s read and write from/to the disk when restoring The HP does aprox 10k/s read/write!! When building the data volumes both server

Re: Very poor performance of sapdb

2005-11-18 Thread Simon Matter
> Hello, > > We use sapdb 7.4.3.31-1 on two different servers. > One server is a Dell PowerEdge 6850 and the other is a HP Proliant DL580 > G3. > When checking both systems, the dell is a little bit faster when writing > to disk and reading from disk but this is normal because the Dell has 256M > c

Very poor performance of sapdb

2005-11-17 Thread B . Lubberdink
Hello, We use sapdb 7.4.3.31-1 on two different servers. One server is a Dell PowerEdge 6850 and the other is a HP Proliant DL580 G3. When checking both systems, the dell is a little bit faster when writing to disk and reading from disk but this is normal because the Dell has 256M cach on the r