[squid-users] WARNING: out of aiocb slots!

Hello All,

I am running a polymix-4 test with 3 coss partition. 2 are files (one
of them is in memory, tmpfs) and one is a raw partition.

I am getting the above message once in a while, not very frequently.
Can I safely increase
MAX_ASYNCOP ?

Does this indicate that the disk is overloaded ?

Are there any messages under coss that would suggest that the disk is
getting overloaded,
similar to the "Queue congestion" message in aufs ?

Setup
---------------
polymix-4, 700req/s

box
-----
Dual Core AMD Opteron(tm) Processor 270 HE, 16GB RAM, 2x SATA disks.

squid-version
-------------------
Squid Cache: Version 2.6.STABLE3
configure options: '--prefix=/usr/squid' '--exec-prefix=/usr/squid'
'--sysconfdir=/usr/squid/etc' '--enable-snmp'
'--enable-err-languages=English' '--enable-linux-netfilter'
'--enable-async-io=24' '--enable-storeio=ufs,aufs,null,coss'
'--enable-coss-aio-ops' '--enable-linux-tproxy' '--enable-gnuregex'
'--enable-internal-dns' '--enable-epoll' '--with-maxfd=32768'
'CFLAGS=-g -O2 -pg '

squid.conf
----------------
visible_hostname 10.51.6.102
cache_dir coss /mnt/cache/coss 8000 max-size=131072 block-size=512
cache_dir coss /mnt/tmp/coss 7500 max-size=131072 block-size=512
cache_dir coss /dev/sdb1 8000 max-size=131072 block-size=512
http_port 8080
request_body_max_size 0
snmp_port 3401
negative_ttl 0 minutes
pid_filename /var/run/squid.pid
coredump_dir /var/log/squid
cache_effective_user squid
cache_effective_group squid
cache_access_log /var/log/squid/access.log
cache_log /var/log/squid/cache.log
cache_store_log none
cache_swap_log /var/log/squid/swap.log
logfile_rotate 10
icp_port 3130
icp_query_timeout 20000
log_icp_queries on
extension_methods SEARCH PROPPATCH
forwarded_for on
acl all src 0.0.0.0/0.0.0.0
acl localhost src 127.0.0.1 10.51.6.102
acl manager proto cache_object
acl snmppublic snmp_community public
http_access allow localhost
miss_access allow all
http_access allow all
snmp_access allow snmppublic all
memory_pools on
cache_mem 1 GB

-- Pranav

------------------------------
http://pd.dnsalias.org
Received on Wed Sep 20 2006 - 12:29:27 MDT