People ; I installed squid 2.6 stable for my Webserver(FreeBSD-6.2 ,1 GB Ram) , where I runs a Plone 2.5 site on Zope2.9 .With other applications such as postfix,mailman etc . Squid-->Apache 2.2-->zope (Previosly it was apache -->>zope ;But it was too slow so I put squid as http accelerator) this setup worked fine for a couple of weeks , but yesetday my site became very slow again , I restarted squid ,apache, and zope server again , but for some time(nearly 20 minutes ) it will be fast after that again became slow . What may be the issue , ? how can I improve the speed ? This is my TOP out put Any hints most welcome : Thanks in advance KK last pid: 1792; load averages: 0.73, 0.50, 0.37 up 0+01:08:08 12:59:26 145 processes: 1 running, 142 sleeping, 2 stopped CPU states: 5.1% user, 0.0% nice, 10.3% system, 0.0% interrupt, 84.6% idle Mem: 690M Active, 106M Inact, 133M Wired, 45M Cache, 110M Buf, 14M Free Swap: 2048M Total, 2048M Free PID USERNAME THR PRI NICE SIZE RES STATE TIME WCPU COMMAND 731 mailman 1 8 0 99732K 97904K nanslp 0:43 3.56% python 522 www 7 20 0 298M 295M kserel 14:37 0.78% python2.4 1764 root 1 96 0 2668K 1936K RUN 0:00 0.28% top 586 root 3 20 0 17272K 2588K kserel 1:06 0.00% gkrellmd 516 www 1 4 0 19308K 17568K select 0:33 0.00% python2.4 505 www 3 20 0 3212K 2024K kserel 0:32 0.00% pound 526 www 3 20 0 89988K 87408K kserel 0:17 0.00% python2.4 765 root 1 4 0 39340K 35628K select 0:12 0.00% perl5.8.8 727 mailman 1 8 0 9744K 7764K nanslp 0:09 0.00% python 728 mailman 1 8 0 8868K 7032K nanslp 0:08 0.00% python 600 squid 1 4 0 13072K 11800K kqread 0:08 0.00% squid 716 mysql 5 20 0 65220K 26708K kserel 0:06 0.00% mysqld 434 bind 1 96 0 7528K 6292K select 0:06 0.00% named 736 mailman 1 8 0 9468K 7632K nanslp 0:05 0.00% python 739 mailman 1 8 0 9380K 7448K nanslp 0:04 0.00% python 560 root 1 8 0 1236K 764K nanslp 0:04 0.00% powerd 726 mailman 1 8 0 9496K 7540K nanslp 0:04 0.00% python 605 root 1 96 0 25720K 24420K select 0:04 0.00% perl5.8.8 1392 tesac 1 96 0 2684K 1820K STOP 0:04 0.00% top 733 mailman 1 8 0 8388K 6512K nanslp 0:03 0.00% python 660 root 1 96 0 2812K 1564K select 0:02 0.00% master 502 www 6 20 0 33184K 23076K kserel 0:02 0.00% httpd 670 postfix 1 96 0 4316K 3052K select 0:02 0.00% qmgr 495 root 1 8 0 16160K 9588K nanslp 0:01 0.00% httpd 839 www 4 20 0 27420K 16040K kserel 0:01 0.00% httpd 501 www 4 20 0 23224K 13504K kserel 0:01 0.00% httpd 503 www 5 20 0 25468K 14676K kserel 0:01 0.00% httpd 365 root 1 96 0 1300K 848K select 0:01 0.00% syslogd 553 root 1 96 0 2920K 1480K select 0:01 0.00% ntpd 1390 tesac 1 96 0 6080K 2524K select 0:00 0.00% sshd 1142 postfix 1 96 0 2876K 1592K select 0:00 0.00% trivial-rewrite Suspended This is my df -h Output df -h Filesystem Size Used Avail Capacity Mounted on /dev/ad4s1a 496M 91M 365M 20% / devfs 1.0K 1.0K 0B 100% /dev /dev/ad4s1f 19G 2.3G 15G 13% /home /dev/ad4s1d 3.9G 71M 3.5G 2% /tmp /dev/ad4s1e 9.7G 5.6G 3.3G 63% /usr /dev/ad4s1g 39G 31G 4.5G 88% /var devfs 1.0K 1.0K 0B 100% /var/named/dev