two servers (4.0 and 3.9) constantly keep freezing
Hi list, I have two servers, one running 4.0 and one with 3.9, they are used as web servers, with a mysql database running on them. Both are more or less idle, but I have seem these messages in /var/log/messages on both servers: bsd: uvm_mapent_alloc: out of static map entries I found this thread, where someone has seen the same problem: http://marc.theaimsgroup.com/?l=openbsd-tech&m=115959929717470&w=2 The servers are either freezing completely, or may still answer on pings, and carp communication, but it is not possible to log in via ssh, or contact the apache server. this is the output on one of the servers, just after new start: # vmstat -s|grep 'kernel map';grep uvm /var/log/messages 36 kernel map entries Jan 24 08:01:30 www /bsd: uvm_mapent_alloc: out of static map entries Jan 29 07:10:06 www /bsd: uvm_mapent_alloc: out of static map entries Feb 22 22:39:41 www /bsd: uvm_mapent_alloc: out of static map entries here the other running for ten days: # vmstat -s|grep 'kernel map';grep uvm /var/log/messages 672 kernel map entries Jan 24 08:01:30 www /bsd: uvm_mapent_alloc: out of static map entries Jan 29 07:10:06 www /bsd: uvm_mapent_alloc: out of static map entries Feb 22 22:39:41 www /bsd: uvm_mapent_alloc: out of static map entries as I read the message of the other thread, I can change some kernel option, but if I understand the message above correctly, with changing the options, i can only extend the time before a new freeze or problems. Is there anything else I can do to keep the machines up and running? kind regards Sebastian
Re: two servers (4.0 and 3.9) constantly keep freezing
On Mon, Feb 26, 2007 at 11:36:38AM +0100, Sebastian Reitenbach wrote: > I found this thread, where someone has seen the same problem: > http://marc.theaimsgroup.com/?l=openbsd-tech&m=115959929717470&w=2 (...) > Is there anything else I can do to keep the machines up and running? Unfortunately, no. Nothing has changed since the above thread. -p.
Re: two servers (4.0 and 3.9) constantly keep freezing
Hi Sebastian, I don't know if this will help at all, but I remember having a Cyrus-IMAP server that always had a fair amount of disk I/O and tons of open files that would exhibit the similar behavior. Unfortunately, it wasn't running GENERIC (had RAIDFRAME and a couple of other things enabled), it was running an old OpenBSD 3.6 (amd64) system and I didn't have time to debug the issue since it was a production box, so I just changed the /usr/src/sys/uvm/uvm_map.h KMAP_ENT #define to be 4000 instead of 1000, recompiled the kernel, and also added crontab entries to stop and start most of the daemons running on that machine frequently, and that kept it up long enough to migrate the data off of it. I know it's incredibly kludgey and hackish, but it worked temporarily Best of luck, Tico Sebastian Reitenbach wrote: Hi list, I have two servers, one running 4.0 and one with 3.9, they are used as web servers, with a mysql database running on them. Both are more or less idle, but I have seem these messages in /var/log/messages on both servers: bsd: uvm_mapent_alloc: out of static map entries I found this thread, where someone has seen the same problem: http://marc.theaimsgroup.com/?l=openbsd-tech&m=115959929717470&w=2 The servers are either freezing completely, or may still answer on pings, and carp communication, but it is not possible to log in via ssh, or contact the apache server. this is the output on one of the servers, just after new start: # vmstat -s|grep 'kernel map';grep uvm /var/log/messages 36 kernel map entries Jan 24 08:01:30 www /bsd: uvm_mapent_alloc: out of static map entries Jan 29 07:10:06 www /bsd: uvm_mapent_alloc: out of static map entries Feb 22 22:39:41 www /bsd: uvm_mapent_alloc: out of static map entries here the other running for ten days: # vmstat -s|grep 'kernel map';grep uvm /var/log/messages 672 kernel map entries Jan 24 08:01:30 www /bsd: uvm_mapent_alloc: out of static map entries Jan 29 07:10:06 www /bsd: uvm_mapent_alloc: out of static map entries Feb 22 22:39:41 www /bsd: uvm_mapent_alloc: out of static map entries as I read the message of the other thread, I can change some kernel option, but if I understand the message above correctly, with changing the options, i can only extend the time before a new freeze or problems. Is there anything else I can do to keep the machines up and running? kind regards Sebastian
Re: two servers (4.0 and 3.9) constantly keep freezing
Hi Tico, Pedro, > have time to debug the issue since it was a production box, so I just > changed the /usr/src/sys/uvm/uvm_map.h KMAP_ENT #define to be 4000 > instead of 1000, recompiled the kernel, and also added crontab entries > to stop and start most of the daemons running on that machine > frequently, and that kept it up long enough to migrate the data off of it. > more or less here, a production box, and no time to play with it :( > I know it's incredibly kludgey and hackish, but it worked temporarily > Best of luck, > Tico thanks for your answers, now I now that there is no other way for now, than recompiling kernel. thanks Sebastian
Re: two servers (4.0 and 3.9) constantly keep freezing
I had the same problem for a long time. I found this site and it hasn't happened since: http://www.openbsdsupport.org/mysql.htm --Bryan On 2/26/07, Sebastian Reitenbach <[EMAIL PROTECTED]> wrote: Hi list, I have two servers, one running 4.0 and one with 3.9, they are used as web servers, with a mysql database running on them. Both are more or less idle, but I have seem these messages in /var/log/messages on both servers: bsd: uvm_mapent_alloc: out of static map entries I found this thread, where someone has seen the same problem: http://marc.theaimsgroup.com/?l=openbsd-tech&m=115959929717470&w=2 The servers are either freezing completely, or may still answer on pings, and carp communication, but it is not possible to log in via ssh, or contact the apache server. this is the output on one of the servers, just after new start: # vmstat -s|grep 'kernel map';grep uvm /var/log/messages 36 kernel map entries Jan 24 08:01:30 www /bsd: uvm_mapent_alloc: out of static map entries Jan 29 07:10:06 www /bsd: uvm_mapent_alloc: out of static map entries Feb 22 22:39:41 www /bsd: uvm_mapent_alloc: out of static map entries here the other running for ten days: # vmstat -s|grep 'kernel map';grep uvm /var/log/messages 672 kernel map entries Jan 24 08:01:30 www /bsd: uvm_mapent_alloc: out of static map entries Jan 29 07:10:06 www /bsd: uvm_mapent_alloc: out of static map entries Feb 22 22:39:41 www /bsd: uvm_mapent_alloc: out of static map entries as I read the message of the other thread, I can change some kernel option, but if I understand the message above correctly, with changing the options, i can only extend the time before a new freeze or problems. Is there anything else I can do to keep the machines up and running? kind regards Sebastian
