Re: [squid-users] storeDiskdSend OPEN: (35) Resource temporarily unavailable

Hi Monah,

Monah Baki wrote:
> Hi all,
>
> I'm running squid 2.6-stable17 on Freebsd 6.3. Machine is a 500MHz with
> 512MB RAM.

Don't you think that your system is a little low on resources even for a
low number of users?

>
> ./configure --prefix=/usr/local/squid
> --enable-storeio=ufs,coss,diskd,null --enable-underscores
> --with-large-files --enable-large-cache-files --enable-delay-pools
> --disable-ident-lookups --enable-snmp --enable-cache-digests
> --enable-underscores --enable-kill-parent-hack
> --enable-removal-policies --enable-async-io --enable-kqueue
> --enable-follow-x-forwarded-for

I think it's better to use "--enable-storeio=ufs,aufs,coss,diskd,null"
and remove "--enable-async-io".

>
>
> I just have squid displaying the following error message:
>
> 2008/01/20 18:24:15| storeDiskdSend OPEN: (35) Resource temporarily
> unavailable
> 2008/01/20 18:24:15| storeDiskdSend: msgsnd: (35) Resource temporarily
> unavailable
> 2008/01/20 18:24:15| assertion failed: diskd/store_io_diskd.c:541:
> "++send_errors < 100"

I have seen these error logs due to DISKD in the past. It went away
after I switched to UFS.

>
>
> jubilee# ipcs -a
> Message Queues:
> T ID KEY MODE OWNER GROUP CREATOR
> CGROUP CBYTES QNUM
> QBYTES LSPID LRPID STIME RTIME CTIME
> q 524288 942080 --rwa------ nobody nobody nobody
> nobody 1280 40 2048
> 920 927 18:05:08 18:05:08 7:34:35
> q 524289 942081 --rwa------ nobody nobody nobody
> nobody 0 0 2048
> 927 920 18:05:08 18:05:08 7:34:35
>
> Shared Memory:
> T ID KEY MODE OWNER GROUP CREATOR
> CGROUP NATTCH SEGSZ CPID LPID ATIME
> DTIME CTIME
> m 524288 942082 --rw------- nobody nobody nobody
> nobody 1 339968 920 927 7:34:35
> 18:05:28 7:34:35
>
> Semaphores:
> T ID KEY MODE OWNER GROUP CREATOR
> CGROUP NSEMS OTIME CTIME
>
>
>
> There's only 4 users on this server, and it's been running for quite
> sometime now.
>
> I read that I need to increase the message queue limits, Im presuming
> it's the "kern.ipc.msgmnb=16384". How can I monitor system before
> anything happens. I can run squidclient mgr:info, but what do I need to
> look for.
>
> Configured thee system with following parameters:
>
> kern.ipc.nmbclusters: 65536
> kern.maxfiles=65536
> kern.maxfilesperproc=32768
> net.inet.ip.portrange.last=65535
> kern.ipc.somaxconn=2048
> kern.maxvnodes=100000
> kern.ipc.msgmnb=16384
> kern.ipc.msgmni=40
> kern.ipc.msgseg=512
> kern.ipc.msgssz=64
> kern.ipc.msgtql=2048
>
> options SHMSEG=16
> options SHMMNI=41
> options MSGSSZ=64
> options MSGTQL=512
> options MSGSEZ=2048
> options SHMMNI=40
> options SHMMAX=2097152
> options SHMALL=4096
> options MAXFILES=8192
> options NMBCLUSTERS=32768
> options MSGMNB=16384
> options VFS_AIO

Did you compiled your kernel or are you loading these tunables dynamically?

I really am not an expert on this kernel compilation with FreeBSD.

But I use the following values:

options SHMSEG=128
options SHMMNI=256
options SHMMAX=50331648 # max shared memory segment size (bytes)
options SHMALL=16384 # max amount of shared memory (pages)
options MSGMNB=16384 # max # of bytes in a queue
options MSGMNI=48 # number of message queue identifiers
options MSGSEG=768 # number of message segments
options MSGSSZ=64 # size of a message segment
options MSGTQL=4096 # max messages in system

But I guess they are not relevant with 6.x because they are tunables
which you can load dynamically.

In the end if DISKD does not work for you, then I guess you should use
UFS, AUFS or COSS.

Since you only have 4 users, all of them will work fine for you...

Thanking you...

>
> In my squid.conf:
> cache_dir diskd /usr/local/squid/var/cache 28000 32 512 Q1=72 Q2=64
>
>
>
> Thanks
>
>
> BSD Networking, Microsoft Notworking
>
>
>
>
>
>

-- 
With best regards and good wishes,
Yours sincerely,
Tek Bahadur Limbu
System Administrator
(TAG/TDG Group)
Jwl Systems Department
Worldlink Communications Pvt. Ltd.
Jawalakhel, Nepal
http://www.wlink.com.np
http://teklimbu.wordpress.com