No takers? The other interesting thing is that the service times increase as traffic decreases. Any theories on that? -=Kevin=- _____________________________________________ Sent: Thursday, June 22, 2006 1:22 PM To: 'squid-users@xxxxxxxxxxxxxxx' Subject: Increased service times using aufs vs diskd I'm using squid as an accelerator and I switched my cache_dir from diskd (used because server is SMP) to aufs because of various bugs in the diskd code (761, 1500). However, when I make the switch (and clear the cache_dir contents) the overall, hit, miss, and near miss service times increase by almost 10 times. Using diskd, the 24 hour average for overall, hit, and near miss is 4ms and near miss is 1ms. After the switch, the times rocket up to 44ms, 43ms, 49ms, and 45ms for overall, hit, miss, and near miss. I am wondering if this is just a function of the squid process now handling disk requests or is an indication of another problem (although ~40ms is probably not much of a problem). Here's the details of the system: OS: RHEL4 Squid: 2.5.stable14 with epoll patch Build options: ./configure --enable-epoll --enable-snmp --enable-removal-policies=heap,lru --enable-storeio=aufs,diskd,ufs --with-pthreads --enable-cachemgr-hostname=localhost --disable-ident-lookups --enable-truncate --enable-cache-digests --enable-htcp Config: http_port 80 icp_port 0 acl NOCACHE urlpath_regex -i \.html \.xsl \.jsp \.xml \.flow no_cache deny NOCACHE cache_mem 16 MB maximum_object_size 1024 KB maximum_object_size_in_memory 32 KB cache_dir aufs /var/spool/squid/01 25892 60 256 cache_dir aufs /var/spool/squid/02 25892 60 256 cache_store_log none refresh_pattern . 10080 100% 43200 ignore-reload override-lastmod shutdown_lifetime 5 seconds acl all src 0.0.0.0/0.0.0.0 acl manager proto cache_object acl localhost src 127.0.0.1/255.255.255.255 acl foo src xxx.xxx.xxx.xxx/255.255.255.255 acl bar src xxx.xxx.xxx.xxx/255.255.255.255 acl to_localhost dst 127.0.0.0/8 acl to_int dst xxx.xxx.xxx.xxx/24 acl to_int dst xxx.xxx.xxx.xxx/25 acl from_xx_xx src xxx.xxx.xxx.xxx/23 acl from_xx_xx src xxx.xxx.xxx.xxx/24 acl from_xx_xx src xxx.xxx.xxx.xxx/24 acl from_xx_xx src xxx.xxx.xxx.xxx/24 acl from_xx_xx src xxx.xxx.xxx.xxx/24 acl from_xx_xx src xxx.xxx.xxx.xxx/25 acl from_xx_xx src xxx.xxx.xxx.xxx/24 acl Safe_ports port 80 # http acl PURGE method PURGE acl snmppublic snmp_community XXXXX http_access allow manager localhost http_access allow manager qw-cx-mgmt http_access deny manager http_access deny !Safe_ports http_access allow all to_int http_access allow PURGE localhost http_access allow PURGE foo http_access allow PURGE bar http_access deny PURGE all http_access allow localhost http_access deny all http_reply_access allow all httpd_accel_host host.domain.com httpd_accel_port 80 logfile_rotate 10 log_icp_queries off cachemgr_passwd XXXX all snmp_port 3401 snmp_access allow snmppublic localhost snmp_access allow snmppublic from_xx_xx snmp_access deny all coredump_dir /var/spool/squid Cache log output on startup: 2006/06/22 16:32:24| Starting Squid Cache version 2.5.STABLE14 for i686-redhat-l inux-gnu... 2006/06/22 16:32:24| Process ID 20978 2006/06/22 16:32:24| With 32768 file descriptors available 2006/06/22 16:32:24| DNS Socket created at 0.0.0.0, port 32797, FD 6 2006/06/22 16:32:24| Adding nameserver 66.77.63.40 from /etc/resolv.conf 2006/06/22 16:32:24| Adding nameserver 66.77.63.41 from /etc/resolv.conf 2006/06/22 16:32:24| Unlinkd pipe opened on FD 11 2006/06/22 16:32:24| Swap maxSize 53026816 KB, estimated 4078985 objects 2006/06/22 16:32:24| Target number of buckets: 203949 2006/06/22 16:32:24| Using 262144 Store buckets 2006/06/22 16:32:24| Max Mem size: 16384 KB 2006/06/22 16:32:24| Max Swap size: 53026816 KB 2006/06/22 16:32:24| Local cache digest enabled; rebuild/rewrite every 3600/3600 sec 2006/06/22 16:32:24| Store logging disabled 2006/06/22 16:32:24| Rebuilding storage in /var/spool/squid/01 (CLEAN) 2006/06/22 16:32:24| Rebuilding storage in /var/spool/squid/02 (CLEAN) 2006/06/22 16:32:24| Using Least Load store dir selection 2006/06/22 16:32:24| Set Current Directory to /var/spool/squid 2006/06/22 16:32:24| Loaded Icons. 2006/06/22 16:32:24| Accepting HTTP connections at 0.0.0.0, port 80, FD 16. 2006/06/22 16:32:24| Accepting HTCP messages on port 4827, FD 17. 2006/06/22 16:32:24| Accepting SNMP messages on port 3401, FD 18. 2006/06/22 16:32:24| WCCP Disabled. 2006/06/22 16:32:24| Ready to serve requests. 2006/06/22 16:32:24| Done reading /var/spool/squid/01 swaplog (382 entries) 2006/06/22 16:32:24| Done reading /var/spool/squid/02 swaplog (520 entries) 2006/06/22 16:32:24| Finished rebuilding storage from disk. 2006/06/22 16:32:24| 902 Entries scanned 2006/06/22 16:32:24| 0 Invalid entries. 2006/06/22 16:32:24| 0 With invalid flags. 2006/06/22 16:32:24| 902 Objects loaded. 2006/06/22 16:32:24| 0 Objects expired. 2006/06/22 16:32:24| 0 Objects cancelled. 2006/06/22 16:32:24| 0 Duplicate URLs purged. 2006/06/22 16:32:24| 0 Swapfile clashes avoided. 2006/06/22 16:32:24| Took 0.3 seconds (3110.0 objects/sec). 2006/06/22 16:32:24| Beginning Validation Procedure 2006/06/22 16:32:24| Completed Validation Procedure 2006/06/22 16:32:24| Validated 902 Entries 2006/06/22 16:32:24| store_swap_size = 12336k 2006/06/22 16:32:26| storeLateRelease: released 0 objects Thanks, -=Kevin=-
