Free memory is *not* a good measure. You have to look at the memory allocated to cache and buffers, also displayed with top.
BackupPC_dump is rather I/O intensive. It is very common for all free memory to be allocated to buffers and/or cache. This memory will be reclaimed for use by a process if it needs it. The kernel makes optimum use of the free memory by using it for this purpose. For example, I have a Mandriva 2007.1 x64 box with 8GB of ram. It is quite common for there to be little or no free memory, but my cache is typically 6 or more GB. -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Hendrik Friedel Sent: Sunday, October 07, 2007 3:40 PM To: [EMAIL PROTECTED] Cc: 'backuppc-users' Subject: Re: [BackupPC-users] How long does a normal Backup take? Hi, Well, top tells me, BackupPc_dump is using about 10% of mem and about 50% CPU. With this, BackupPC is the top resource user. I'm not too familiar with processes under linux. There are about 10 Processes "vdr", using exactly the same amount of mem(7.5%), but having a different PID. So do I have to add these up (then it would be 75% mem Usage by vdr), or is it just one job, thus using 7.5%? Besides this, please take a look at the attached image. I started the Backup at 14:08. The free Memory drops to almost zero. The job was finished at about 20:30 (10 gig, 0.5MB/sec). Immidiately the free mem increases. Then, at 21:00 another backup started and the free mem goes down again. CPU usage was below 75% all the time. Do you have any Idea, why the Backup takes so much memory, and especially why this apparently slows down the backup? Greetings, Hendrik -----Ursprüngliche Nachricht----- Von: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Gesendet: Sonntag, 7. Oktober 2007 17:55 An: Hendrik Friedel Cc: 'backuppc-users' Betreff: Re: AW: AW: [BackupPC-users] How long does a normal Backup take? Hello Hendrik, Am Sonntag, den 07.10.2007, 17:46 +0200 schrieb Hendrik Friedel: > Could you give me a hint, how I can check, what process is using the Mem? What about top sorted by memory usage? -- rbrausse ferdinand-kopf-str 7 79117 freiburg +497613845491 -- No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.488 / Virus Database: 269.14.0/1048 - Release Date: 03.10.2007 20:22 ------------------------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now >> http://get.splunk.com/ _______________________________________________ BackupPC-users mailing list BackupPC-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/backuppc-users http://backuppc.sourceforge.net/
