squid速度變慢怎么解決?

仙人掌

我用squid做了代理服務(wù)器,但隔一段時(shí)間(有時(shí)十多分鐘),客戶端訪問就變得很慢.登陸服務(wù)器后把squid重新啟動(dòng)一下又恢得正常,怎么解決這種問題呢?謝謝!

platinum

看看 cache.log

仙人掌

平時(shí)我也沒有啟用logs,這是cache.log顯示的

2005/09/04 23:53:04| Starting Squid Cache version 2.5.STABLE6 for i686-pc-linux-gnu...
2005/09/04 23:53:04| Process ID 1912
2005/09/04 23:53:04| With 1024 file descriptors available
2005/09/04 23:53:04| Performing DNS Tests...
2005/09/04 23:53:04| Successful DNS name lookup tests...
2005/09/04 23:53:04| DNS Socket created at 0.0.0.0, port 32774, FD 4
2005/09/04 23:53:04| Adding nameserver 61.128.128.68 from /etc/resolv.conf
2005/09/04 23:53:04| Adding nameserver 218.201.4.3 from /etc/resolv.conf
FATAL: Cannot open '/usr/local/squid/var/logs/access.log' for writing.
        The parent directory must be writeable by the
        user 'nobody', which is the cache_effective_user
        set in squid.conf.
Squid Cache (Version 2.5.STABLE6): Terminated abnormally.
CPU Usage: 0.010 seconds = 0.010 user + 0.000 sys
Maximum Resident Size: 0 KB
Page faults with physical i/o: 302
2005/09/04 23:53:07| Starting Squid Cache version 2.5.STABLE6 for i686-pc-linux-gnu...
2005/09/04 23:53:07| Process ID 1915
2005/09/04 23:53:07| With 1024 file descriptors available
2005/09/04 23:53:07| Performing DNS Tests...
2005/09/04 23:53:07| Successful DNS name lookup tests...
2005/09/04 23:53:07| DNS Socket created at 0.0.0.0, port 32774, FD 4
2005/09/04 23:53:07| Adding nameserver 61.128.128.68 from /etc/resolv.conf
2005/09/04 23:53:07| Adding nameserver 218.201.4.3 from /etc/resolv.conf
FATAL: Cannot open '/usr/local/squid/var/logs/access.log' for writing.
        The parent directory must be writeable by the
        user 'nobody', which is the cache_effective_user
        set in squid.conf.
Squid Cache (Version 2.5.STABLE6): Terminated abnormally.
CPU Usage: 0.010 seconds = 0.010 user + 0.000 sys
Maximum Resident Size: 0 KB
Page faults with physical i/o: 302
2005/09/04 23:53:10| Starting Squid Cache version 2.5.STABLE6 for i686-pc-linux-gnu...
2005/09/04 23:53:10| Process ID 1919
2005/09/04 23:53:10| With 1024 file descriptors available
2005/09/04 23:53:10| Performing DNS Tests...
2005/09/04 23:53:10| Successful DNS name lookup tests...
2005/09/04 23:53:10| DNS Socket created at 0.0.0.0, port 32774, FD 4
2005/09/04 23:53:10| Adding nameserver 61.128.128.68 from /etc/resolv.conf
2005/09/04 23:53:10| Adding nameserver 218.201.4.3 from /etc/resolv.conf
FATAL: Cannot open '/usr/local/squid/var/logs/access.log' for writing.
        The parent directory must be writeable by the
        user 'nobody', which is the cache_effective_user
        set in squid.conf.
Squid Cache (Version 2.5.STABLE6): Terminated abnormally.
CPU Usage: 0.010 seconds = 0.000 user + 0.010 sys
Maximum Resident Size: 0 KB
Page faults with physical i/o: 302
2005/09/04 23:53:13| Starting Squid Cache version 2.5.STABLE6 for i686-pc-linux-gnu...
2005/09/04 23:53:13| Process ID 1922
2005/09/04 23:53:13| With 1024 file descriptors available
2005/09/04 23:53:13| Performing DNS Tests...
2005/09/04 23:53:13| Successful DNS name lookup tests...
2005/09/04 23:53:13| DNS Socket created at 0.0.0.0, port 32774, FD 4
2005/09/04 23:53:13| Adding nameserver 61.128.128.68 from /etc/resolv.conf
2005/09/04 23:53:13| Adding nameserver 218.201.4.3 from /etc/resolv.conf
FATAL: Cannot open '/usr/local/squid/var/logs/access.log' for writing.
        The parent directory must be writeable by the
        user 'nobody', which is the cache_effective_user
        set in squid.conf.
Squid Cache (Version 2.5.STABLE6): Terminated abnormally.
CPU Usage: 0.010 seconds = 0.010 user + 0.000 sys
Maximum Resident Size: 0 KB
Page faults with physical i/o: 302
2005/09/04 23:53:16| Starting Squid Cache version 2.5.STABLE6 for i686-pc-linux-gnu...
2005/09/04 23:53:16| Process ID 1925
2005/09/04 23:53:16| With 1024 file descriptors available
2005/09/04 23:53:16| Performing DNS Tests...
2005/09/04 23:53:16| Successful DNS name lookup tests...
2005/09/04 23:53:16| DNS Socket created at 0.0.0.0, port 32774, FD 4
2005/09/04 23:53:16| Adding nameserver 61.128.128.68 from /etc/resolv.conf
2005/09/04 23:53:16| Adding nameserver 218.201.4.3 from /etc/resolv.conf
FATAL: Cannot open '/usr/local/squid/var/logs/access.log' for writing.
        The parent directory must be writeable by the
        user 'nobody', which is the cache_effective_user
        set in squid.conf.
Squid Cache (Version 2.5.STABLE6): Terminated abnormally.
CPU Usage: 0.010 seconds = 0.010 user + 0.000 sys
Maximum Resident Size: 0 KB
Page faults with physical i/o: 302

仙人掌

如果把cache做在ramdisk里,性能會(huì)好些嗎?

仙人掌

問題基本解決了,是dnsserver在作怪,我重新編譯了squid.不再出現(xiàn)這種情況.

http://numen.cqeda.com/


我用squid作的反向代理.

platinum

說說是如何看出 dnsserver 作怪的？
重新編譯為何就解決了？

仙人掌

我自己編譯的squid,默認(rèn)編譯的,做的反向透明代理.因?yàn)長AN內(nèi)還有幾臺(tái)WEB服務(wù)器.但在/usr/local/squid/libexec 下沒有dnsserver文件.
配置dns_children 5 后顯示出錯(cuò)信息.

我看了一下squid.conf文檔. 編譯squid時(shí)要加上--disable-internal-dns選項(xiàng)，這樣安裝后的squid才能使用dns_children這項(xiàng)

重新編譯配置后就正常了.
感謝各位兄弟!!

platinum

但如果 dns 請求過多， 5 條就遠(yuǎn)遠(yuǎn)不夠了
如果設(shè)置 dnsserver 數(shù)量過大，進(jìn)程里會(huì)有 N 個(gè)這東西，很可怕的

txkss

我記得以前我編譯squid時(shí)  怎么也啟動(dòng)不了它
后面發(fā)現(xiàn)它是在啟動(dòng)的時(shí)候打DNS服務(wù)器
后我來加了一個(gè)-D選項(xiàng)   就讓它啟動(dòng)起來了

這種情況如何在編譯的時(shí)候克服啊？

謝謝

race

近來發(fā)現(xiàn)我們的squid代理服務(wù)器在周六周日訪問量小的時(shí)候出現(xiàn)上述問題，訪問外部很慢，重起后能正常一段時(shí)間，小于20分鐘。
凡是正常上班時(shí)間倒是還沒遇到類似的問題。有時(shí)間俺也去看看那些紀(jì)錄文件。