Re: [gentoo-user] gentoo-box stopping services
Am 23.04.2010 05:28, schrieb Stroller: The added swapfile with one GB won't help here for a start? Yes, it will. If it's running out of RAM+swap, then more swap will help. I watch the system now, only 6 MB of RAM free now ... the AV-scanners grab the most ... I already deactivated f-secure (fsavd) because it timed out while scanning a 10k text-mail :-( Gotta get some RAM, yes. S
Re: [gentoo-user] gentoo-box stopping services
Am 21.04.2010 11:09, schrieb Stroller: OK, a bit more RAM wouldn't hurt here. But I am compiling stuff right now. I would add more. Services mysteriously dying, surely that could be because the kernel is killing them off due to an out-of-memory condition? Shouldn't the kernel *swap* then ? I suggested adding RAM there, sure ... Maybe you have changed to a different compiler version in the past, and this creates larger binaries? current version of gcc: 4.3.2-r3 (04:13:52 18.04.2009) So it is about one year old, no changes since then. The symptoms only started some week ago or two ... I rather wonder about that f-secure scanner fsav ... I had to manually fiddle it onto the system and it takes quite much ram and cpu. But it is installed since june 2009 as well. I seem to get into more trouble when I'm cautious with updates than I do when I just let 'em rip as often as possible. More frequent updates means fewer updates. I have to find some sweet spot here. I have quite many servers out there at customers sites ... noone so far pays me for regularly emerging world there ... this has to change, you are right ;-) Stefan
Re: [gentoo-user] gentoo-box stopping services
On Thursday 22 April 2010 17:31:33 Stefan G. Weichinger wrote: Am 21.04.2010 11:09, schrieb Stroller: OK, a bit more RAM wouldn't hurt here. But I am compiling stuff right now. I would add more. Services mysteriously dying, surely that could be because the kernel is killing them off due to an out-of-memory condition? Shouldn't the kernel *swap* then ? No, the OOM killer kicks in when the kernel has no more virtual memory, including swap. Either way, more RAM is the answer. Or fidn the app with the memory leak if you are unlucky enough to have one of those running around. [snip] -- alan dot mckinnon at gmail dot com
Re: [gentoo-user] gentoo-box stopping services
Am 22.04.2010 17:50, schrieb Alan McKinnon: Shouldn't the kernel *swap* then ? No, the OOM killer kicks in when the kernel has no more virtual memory, including swap. Either way, more RAM is the answer. Or fidn the app with the memory leak if you are unlucky enough to have one of those running around. The added swapfile with one GB won't help here for a start? S
Re: [gentoo-user] gentoo-box stopping services
On Thursday 22 April 2010 18:24:08 Stefan G. Weichinger wrote: Am 22.04.2010 17:50, schrieb Alan McKinnon: Shouldn't the kernel *swap* then ? No, the OOM killer kicks in when the kernel has no more virtual memory, including swap. Either way, more RAM is the answer. Or fidn the app with the memory leak if you are unlucky enough to have one of those running around. The added swapfile with one GB won't help here for a start? It will certainly help. If your core problem is simply not enough RAM, then 1G more might be all you need. You'd have to run checks and do some monitoring to see if performance is affected. I haven't followed the full thread so I don't know what you are running; and some daemons perform really badly if they have to touch swap. Apache for example, a busy MTA for another - disks are thousands of times slower than RAM, so if a webserver has to swap memory back in from disk, it almost instantly brings the server to a grinding halt. On my web and mail servers I have no swap at all, they do have lots and lots of RAM; my Sybase database servers have enormous amounts of swap. Each server has been profiled so it is set up to be as close to ideal as I can determine. -- alan dot mckinnon at gmail dot com
Re: [gentoo-user] gentoo-box stopping services
On 22 Apr 2010, at 17:24, Stefan G. Weichinger wrote: Am 22.04.2010 17:50, schrieb Alan McKinnon: Shouldn't the kernel *swap* then ? No, the OOM killer kicks in when the kernel has no more virtual memory, including swap. Either way, more RAM is the answer. Or fidn the app with the memory leak if you are unlucky enough to have one of those running around. The added swapfile with one GB won't help here for a start? Yes, it will. If it's running out of RAM+swap, then more swap will help. Stroller.
Re: [gentoo-user] gentoo-box stopping services
Am 21.04.2010 00:07, schrieb Stroller: You emphasise how old the hardware is, but this really isn't a problem. As you say, one increasingly fears the death of a system which is getting so old, but I have two systems nearly as old running for years without hardware problems. Yes, it does what it should do. It's just that it gets more probable to have some strange and hidden defects *maybe*. But it would show other symptoms then, I assume. The questions I must ask are: - How uptodate is the Gentoo software? - Do you run updates regularly? - Did you run any shortly before this started occurring? - Have you run revdep-rebuild and stuff? - Does the system have sufficient swap? swap should be OK: # free -m total used free sharedbuffers cached Mem: 501484 17 0 16241 -/+ buffers/cache:226275 Swap: 494288205 OK, a bit more RAM wouldn't hurt here. But I am compiling stuff right now. - ad updates: I was rather defensive there, I have to admit .. Just like never touch a running system ... I updated the relevant pkgs like postfix, samba, clamav ... but there are around 60 pkgs to update today. Stuff like glibc, udev, pam I will apply them now step by step ... revdep-rebuild was OK before, I had checked that after the last updates a few days ago. My first idea was to upgrade the kernel to maybe catch some relevant fixes, that was about a week ago. There was no specific update triggering this, in fact I hadn't touched that box for weeks when the responsible man called me to tell me about the new problems ... Stefan
Re: [gentoo-user] gentoo-box stopping services
On 21 Apr 2010, at 08:28, Stefan G. Weichinger wrote: ... Does the system have sufficient swap? swap should be OK: # free -m total used free sharedbuffers cached Mem: 501484 17 0 16 241 -/+ buffers/cache:226275 Swap: 494288205 OK, a bit more RAM wouldn't hurt here. But I am compiling stuff right now. I would add more. Services mysteriously dying, surely that could be because the kernel is killing them off due to an out-of-memory condition? Maybe you have changed to a different compiler version in the past, and this creates larger binaries? That seems a bit tenuous, I don't know, but you can use a swapfile on Linux (i.e. you can add to the current swap without having to create an additional partition), and I doubt if it is hard to set up. ad updates: I was rather defensive there, I have to admit .. Just like never touch a running system ... I seem to get into more trouble when I'm cautious with updates than I do when I just let 'em rip as often as possible. More frequent updates means fewer updates. Stroller.
Re: [gentoo-user] gentoo-box stopping services
On Tuesday 20 April 2010 13:01:52 Stefan G. Weichinger wrote: greetings, gentoo-users ... One of my customers runs an old P3 as a mail-gateway and samba-server (yeah, I know ...) behind his firewall ... They simply don't want to swap hardware, they are happy ... until the following started to happen every week or so: The server goes offline, you can ping it OK but services like smbd, postfix, sshd all are not reachable anymore. I see the open ports with nmap from my machine ... but they are shown as closed. When the guy there restarts sshd on the server itself I am able to login again without a problem. There are no bad messages in dmesg and/or /var/log/messages. But this seems to be related to the fact that syslog-ng also is inactive then ... so who should log errors ... ? -- I thought maybe the NIC has a problem? Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8139/8139C/8139C+ (rev 10) but as it doesn't lose its IP and config I think that is not the case here? Have you looked at dmesg in case there is something there that the kernel's spewed out? Also, you haven't run out of space? df -h -- Regards, Mick signature.asc Description: This is a digitally signed message part.
Re: [gentoo-user] gentoo-box stopping services
Am 21.04.2010 09:18, schrieb Mick: Have you looked at dmesg in case there is something there that the kernel's spewed out? Also, you haven't run out of space? df -h checked both before even posting here: nothing stinky in dmesg, df -h shows enough free space on the partitions. Thanks, S
Re: [gentoo-user] gentoo-box stopping services
additional thoughts: Am 20.04.2010 14:01, schrieb Stefan G. Weichinger: I thought maybe the NIC has a problem? Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8139/8139C/8139C+ (rev 10) but as it doesn't lose its IP and config I think that is not the case here? I noticed that both relevant kernel-modules were loaded as noted here: http://www.mail-archive.com/net...@vger.kernel.org/msg60241.html I was able to rmmod 8139cp without losing network ... This might just be a cosmetic issue, I just wanted to add that info. Stefan
Re: [gentoo-user] gentoo-box stopping services
On 20 Apr 2010, at 13:01, Stefan G. Weichinger wrote: ... One of my customers runs an old P3 as a mail-gateway and samba-server (yeah, I know ...) behind his firewall ... They simply don't want to swap hardware, they are happy ... until the following started to happen every week or so: You emphasise how old the hardware is, but this really isn't a problem. As you say, one increasingly fears the death of a system which is getting so old, but I have two systems nearly as old running for years without hardware problems. The questions I must ask are: - How uptodate is the Gentoo software? - Do you run updates regularly? - Did you run any shortly before this started occurring? - Have you run revdep-rebuild and stuff? - Does the system have sufficient swap? Stroller.
