<div dir="ltr"><div>Folks,</div><div><br></div><div>It my first time here, i'm Fabio. </div><div>My apologizes if my questions looks like a children :D</div><div>I'm a newbie in Varnish Cache, but I'm studying hard.</div>
<div><br></div><div>I manage a web server with one single domain (popular fitness/health wordpress blog in Brazil) which receives 50 K page views/day. When the person goes to tv shows, we receive peaks of 230 K page views/day with 5 or 6 K simultaneous users.</div>
<div>I've got a very good hit ratio, and all pages are showing fast.<br></div><div><br></div><div>Everything works ok, except when the cache is purged after a new post or causeless (I just can not understand it yet). </div>
<div>The css of home page gone away and wordpress admin not works properly.</div><div><br></div><div>When i clear the cache (with command: varnishadm "ban req.url ~ /"), everything works ok again, but not for long time.</div>
<div><br></div><div>Can u help me, saying if i forgot or missed some syntax or parameter in my configuration, which goes below.</div><div><br></div><div>#######################</div><div>default.vcl</div><div>#######################</div>
<div><br></div><div><div>backend default {</div><div> .host = "127.0.0.1";</div><div> .port = "8081";</div><div> .connect_timeout = 300s;</div><div> .first_byte_timeout = 300s;</div>
<div> .between_bytes_timeout = 300s;</div><div> .url = "/";</div><div> .interval = 5s;</div><div> .timeout = 1 s;</div><div> .window = 5;</div>
<div> .threshold = 3;</div><div>}</div><div><br></div><div>#acl purge {</div><div># "localhost";</div><div>#} </div><div>sub vcl_recv {</div><div> </div><div> # Allow the back-end to serve up stale content if it is responding slowly.</div>
<div> set req.grace = 2m;</div><div> </div><div> # Always cache the following file types for all users.</div><div> if ( req.url ~ "(?i)\.(png|gif|jpeg|jpg|ico|swf|css|js|html|htm)(\?[a-z0-9]+)?$" ) { </div>
<div> unset req.http.cookie;</div><div> }</div><div> </div><div> # Don't serve cached pages to logged in users</div><div> if ( req.http.cookie ~ "wordpress_logged_in" || req.url ~ "vaultpress=true" ) {</div>
<div> return( pass );</div><div> }</div><div> </div><div> # Drop any cookies sent to WordPress.</div><div> if ( ! ( req.url ~ "wp-(login|admin)" ) ) {</div><div> unset req.http.cookie;</div>
<div> }</div><div># Purge Cache</div><div># if (req.request == "PURGE") {</div><div># if (!client.ip ~ purge) {</div><div># error 405 "Not allowed.";</div>
<div># }</div><div># return (lookup);</div><div># }</div><div> </div><div> # Handle compression correctly. Different browsers send different</div><div> # "Accept-Encoding" headers, even though they mostly all support the same</div>
<div> # compression mechanisms. By consolidating these compression headers into</div><div> # a consistent format, we can reduce the size of the cache and get more hits.</div><div> # @see: <a href="http://varnish.projects.linpro.no/wiki/FAQ/Compression">http://varnish.projects.linpro.no/wiki/FAQ/Compression</a></div>
<div> if ( req.http.Accept-Encoding ) {</div><div> </div><div> if ( req.http.Accept-Encoding ~ "gzip" ) {</div><div> # If the browser supports it, we'll use gzip.</div>
<div> set req.http.Accept-Encoding = "gzip";</div><div> }</div><div> </div><div> else if ( req.http.Accept-Encoding ~ "deflate" ) {</div><div> # Next, try deflate if it is supported.</div>
<div> set req.http.Accept-Encoding = "deflate";</div><div> }</div><div> </div><div> else {</div><div> # Unknown algorithm. Remove it and send unencoded.</div>
<div> unset req.http.Accept-Encoding;</div><div> }</div><div> </div><div> }</div><div> if ( req.request == "POST") {</div><div> ban("req.http.host == " + req.http.Host);</div>
<div> return(pass);</div><div> }</div><div>}</div><div><br></div><div>sub vcl_fetch {</div><div> </div><div> # Allow items to be stale if needed.</div><div> set beresp.grace = 2m;</div><div><br></div>
<div> # Tempo de cache depois de transferido do Backend (Apache)</div><div> set beresp.ttl = 48h;</div><div> return (deliver);</div><div> </div><div> # Drop any cookies WordPress tries to send back to the client.</div>
<div> if ( ! req.url ~ "wp-(login|admin)" && ! req.http.cookie ~ "wordpress_logged_in" ) {</div><div> unset beresp.http.set-cookie;</div><div> }</div><div> </div><div>
}</div><div><br></div><div>sub vcl_hit {</div><div> if (req.request == "PURGE") {</div><div> purge;</div><div> error 200 "Purged.";</div><div> }</div><div>}</div><div><br></div><div>sub vcl_miss {</div>
<div> if (req.request == "PURGE") {</div><div> purge;</div><div> error 200 "Purged.";</div><div> }</div><div>}</div><div><br></div><div>sub vcl_deliver {</div>
<div> if (obj.hits > 0) {</div><div> set resp.http.X-Varnish-Cache = "HIT";</div><div> }</div><div> else {</div><div> set resp.http.X-Varnish-Cache = "MISS";</div><div> }</div><div>}</div>
</div><div><br></div><div>######################</div><div>varnishstat</div><div>######################</div><div><br></div><div><div>[root~]# varnishstat -1</div><div>client_conn 256621 11.19 Client connections accepted</div>
<div>client_drop 0 0.00 Connection dropped, no sess/wrk</div><div>client_req 878216 38.28 Client requests received</div><div>cache_hit 672456 29.31 Cache hits</div>
<div>cache_hitpass 0 0.00 Cache hits for pass</div><div>cache_miss 170160 7.42 Cache misses</div><div>backend_conn 5702 0.25 Backend conn. success</div><div>
backend_unhealthy 0 0.00 Backend conn. not attempted</div><div>backend_busy 0 0.00 Backend conn. too many</div><div>backend_fail 76 0.00 Backend conn. failures</div>
<div>backend_reuse 199994 8.72 Backend conn. reuses</div><div>backend_toolate 2152 0.09 Backend conn. was closed</div><div>backend_recycle 202152 8.81 Backend conn. recycles</div>
<div>backend_retry 11 0.00 Backend conn. retry</div><div>fetch_head 0 0.00 Fetch head</div><div>fetch_length 201283 8.77 Fetch with Length</div><div>fetch_chunked 3968 0.17 Fetch chunked</div>
<div>fetch_eof 0 0.00 Fetch EOF</div><div>fetch_bad 0 0.00 Fetch had bad headers</div><div>fetch_close 60 0.00 Fetch wanted close</div><div>fetch_oldhttp 0 0.00 Fetch pre HTTP/1.1 closed</div>
<div>fetch_zero 0 0.00 Fetch zero len</div><div>fetch_failed 34 0.00 Fetch failed</div><div>fetch_1xx 0 0.00 Fetch no body (1xx)</div><div>fetch_204 0 0.00 Fetch no body (204)</div>
<div>fetch_304 319 0.01 Fetch no body (304)</div><div>n_sess_mem 220 . N struct sess_mem</div><div>n_sess 128 . N struct sess</div><div>n_object 7354 . N struct object</div>
<div>n_vampireobject 0 . N unresurrected objects</div><div>n_objectcore 7435 . N struct objectcore</div><div>n_objecthead 7449 . N struct objecthead</div>
<div>n_waitinglist 88 . N struct waitinglist</div><div>n_vbc 5 . N struct vbc</div><div>n_wrk 100 . N worker threads</div><div>n_wrk_create 100 0.00 N worker threads created</div>
<div>n_wrk_failed 0 0.00 N worker threads not created</div><div>n_wrk_max 0 0.00 N worker threads limited</div><div>n_wrk_lqueue 0 0.00 work request queue length</div>
<div>n_wrk_queued 0 0.00 N queued work requests</div><div>n_wrk_drop 0 0.00 N dropped work requests</div><div>n_backend 1 . N backends</div>
<div>
n_expired 162687 . N expired objects</div><div>n_lru_nuked 0 . N LRU nuked objects</div><div>n_lru_moved 457757 . N LRU moved objects</div><div>
losthdr 0 0.00 HTTP header overflows</div>
<div>n_objsendfile 0 0.00 Objects sent with sendfile</div><div>n_objwrite 746317 32.53 Objects sent with write</div><div>n_objoverflow 0 0.00 Objects overflowing workspace</div>
<div>s_sess 256609 11.18 Total Sessions</div><div>s_req 878216 38.28 Total Requests</div><div>s_pipe 32 0.00 Total pipe</div><div>s_pass 35568 1.55 Total pass</div>
<div>s_fetch 205596 8.96 Total fetch</div><div>s_hdrbytes 301843193 13156.22 Total header bytes</div><div>s_bodybytes 26851914941 1170375.06 Total body bytes</div><div>sess_closed 17724 0.77 Session Closed</div>
<div>sess_pipeline 6099 0.27 Session Pipeline</div><div>sess_readahead 2246 0.10 Session Read Ahead</div><div>sess_linger 856500 37.33 Session Linger</div><div>sess_herd 861705 37.56 Session herd</div>
<div>shm_records 46079248 2008.42 SHM records</div><div>shm_writes 2958209 128.94 SHM writes</div><div>shm_flushes 0 0.00 SHM flushes due to overflow</div><div>shm_cont 1658 0.07 SHM MTX contention</div>
<div>shm_cycles 21 0.00 SHM cycles through buffer</div><div>sms_nreq 132 0.01 SMS allocator requests</div><div>sms_nobj 0 . SMS outstanding allocations</div>
<div>sms_nbytes 0 . SMS outstanding bytes</div><div>sms_balloc 55176 . SMS bytes allocated</div><div>sms_bfree 55176 . SMS bytes freed</div>
<div>
backend_req 205663 8.96 Backend requests made</div><div>n_vcl 1 0.00 N vcl total</div><div>n_vcl_avail 1 0.00 N vcl available</div><div>n_vcl_discard 0 0.00 N vcl discarded</div>
<div>n_ban 661 . N total active bans</div><div>n_ban_gone 659 . N total gone bans</div><div>n_ban_add 661 0.03 N new bans added</div><div>
n_ban_retire 0 0.00 N old bans deleted</div><div>n_ban_obj_test 162881 7.10 N objects tested</div><div>n_ban_re_test 162891 7.10 N regexps tested against</div><div>
n_ban_dups 658 0.03 N duplicate bans removed</div><div>hcb_nolock 842631 36.73 HCB Lookups without lock</div><div>hcb_lock 7470 0.33 HCB Lookups with lock</div>
<div>hcb_insert 7470 0.33 HCB Inserts</div><div>esi_errors 0 0.00 ESI parse errors (unlock)</div><div>esi_warnings 0 0.00 ESI parse warnings (unlock)</div>
<div>accept_fail 0 0.00 Accept failures</div><div>client_drop_late 0 0.00 Connection dropped late</div><div>uptime 22943 1.00 Client uptime</div><div>
dir_dns_lookups 0 0.00 DNS director lookups</div><div>dir_dns_failed 0 0.00 DNS director failed lookups</div><div>dir_dns_hit 0 0.00 DNS director cached lookups hit</div>
<div>dir_dns_cache_full 0 0.00 DNS director full dnscache</div><div>vmods 0 . Loaded VMODs</div><div>n_gzip 0 0.00 Gzip operations</div><div>
n_gunzip 26083 1.14 Gunzip operations</div><div>sess_pipe_overflow 0 . Dropped sessions due to session pipe overflow</div><div>LCK.sms.creat 1 0.00 Created locks</div>
<div>LCK.sms.destroy 0 0.00 Destroyed locks</div><div>LCK.sms.locks 396 0.02 Lock Operations</div><div>LCK.sms.colls 0 0.00 Collisions</div><div>LCK.smp.creat 0 0.00 Created locks</div>
<div>LCK.smp.destroy 0 0.00 Destroyed locks</div><div>LCK.smp.locks 0 0.00 Lock Operations</div><div>LCK.smp.colls 0 0.00 Collisions</div><div>LCK.sma.creat 1 0.00 Created locks</div>
<div>LCK.sma.destroy 0 0.00 Destroyed locks</div><div>LCK.sma.locks 84162 3.67 Lock Operations</div><div>LCK.sma.colls 0 0.00 Collisions</div><div>LCK.smf.creat 1 0.00 Created locks</div>
<div>LCK.smf.destroy 0 0.00 Destroyed locks</div><div>LCK.smf.locks 689712 30.06 Lock Operations</div><div>LCK.smf.colls 0 0.00 Collisions</div><div>LCK.hsl.creat 0 0.00 Created locks</div>
<div>LCK.hsl.destroy 0 0.00 Destroyed locks</div><div>LCK.hsl.locks 0 0.00 Lock Operations</div><div>LCK.hsl.colls 0 0.00 Collisions</div><div>LCK.hcb.creat 1 0.00 Created locks</div>
<div>LCK.hcb.destroy 0 0.00 Destroyed locks</div><div>LCK.hcb.locks 7712 0.34 Lock Operations</div><div>LCK.hcb.colls 0 0.00 Collisions</div><div>LCK.hcl.creat 0 0.00 Created locks</div>
<div>LCK.hcl.destroy 0 0.00 Destroyed locks</div><div>LCK.hcl.locks 0 0.00 Lock Operations</div><div>LCK.hcl.colls 0 0.00 Collisions</div><div>LCK.vcl.creat 1 0.00 Created locks</div>
<div>LCK.vcl.destroy 0 0.00 Destroyed locks</div><div>LCK.vcl.locks 928 0.04 Lock Operations</div><div>LCK.vcl.colls 0 0.00 Collisions</div><div>LCK.stat.creat 1 0.00 Created locks</div>
<div>LCK.stat.destroy 0 0.00 Destroyed locks</div><div>LCK.stat.locks 256709 11.19 Lock Operations</div><div>LCK.stat.colls 0 0.00 Collisions</div><div>LCK.sessmem.creat 1 0.00 Created locks</div>
<div>LCK.sessmem.destroy 0 0.00 Destroyed locks</div><div>LCK.sessmem.locks 259356 11.30 Lock Operations</div><div>LCK.sessmem.colls 0 0.00 Collisions</div><div>LCK.wstat.creat 1 0.00 Created locks</div>
<div>LCK.wstat.destroy 0 0.00 Destroyed locks</div><div>LCK.wstat.locks 46183 2.01 Lock Operations</div><div>LCK.wstat.colls 0 0.00 Collisions</div><div>LCK.herder.creat 1 0.00 Created locks</div>
<div>LCK.herder.destroy 0 0.00 Destroyed locks</div><div>LCK.herder.locks 1 0.00 Lock Operations</div><div>LCK.herder.colls 0 0.00 Collisions</div><div>LCK.wq.creat 2 0.00 Created locks</div>
<div>LCK.wq.destroy 0 0.00 Destroyed locks</div><div>LCK.wq.locks 1805936 78.71 Lock Operations</div><div>LCK.wq.colls 0 0.00 Collisions</div><div>LCK.objhdr.creat 7557 0.33 Created locks</div>
<div>LCK.objhdr.destroy 108 0.00 Destroyed locks</div><div>LCK.objhdr.locks 3858977 168.20 Lock Operations</div><div>LCK.objhdr.colls 0 0.00 Collisions</div><div>LCK.exp.creat 1 0.00 Created locks</div>
<div>LCK.exp.destroy 0 0.00 Destroyed locks</div><div>LCK.exp.locks 518339 22.59 Lock Operations</div><div>LCK.exp.colls 0 0.00 Collisions</div><div>LCK.lru.creat 2 0.00 Created locks</div>
<div>LCK.lru.destroy 0 0.00 Destroyed locks</div><div>LCK.lru.locks 332730 14.50 Lock Operations</div><div>LCK.lru.colls 0 0.00 Collisions</div><div>LCK.cli.creat 1 0.00 Created locks</div>
<div>LCK.cli.destroy 0 0.00 Destroyed locks</div><div>LCK.cli.locks 7663 0.33 Lock Operations</div><div>LCK.cli.colls 0 0.00 Collisions</div><div>LCK.ban.creat 1 0.00 Created locks</div>
<div>LCK.ban.destroy 0 0.00 Destroyed locks</div><div>LCK.ban.locks 357251 15.57 Lock Operations</div><div>LCK.ban.colls 0 0.00 Collisions</div><div>LCK.vbp.creat 1 0.00 Created locks</div>
<div>LCK.vbp.destroy 0 0.00 Destroyed locks</div><div>LCK.vbp.locks 0 0.00 Lock Operations</div><div>LCK.vbp.colls 0 0.00 Collisions</div><div>LCK.vbe.creat 1 0.00 Created locks</div>
<div>LCK.vbe.destroy 0 0.00 Destroyed locks</div><div>LCK.vbe.locks 11551 0.50 Lock Operations</div><div>LCK.vbe.colls 0 0.00 Collisions</div><div>LCK.backend.creat 1 0.00 Created locks</div>
<div>LCK.backend.destroy 0 0.00 Destroyed locks</div><div>LCK.backend.locks 421628 18.38 Lock Operations</div><div>LCK.backend.colls 0 0.00 Collisions</div><div>SMF.s0.c_req 339798 14.81 Allocator requests</div>
<div>SMF.s0.c_fail 0 0.00 Allocator failures</div><div>SMF.s0.c_bytes 14666334208 639250.94 Bytes allocated</div><div>SMF.s0.c_freed 14026391552 611358.22 Bytes freed</div><div>
SMF.s0.g_alloc 14721 . Allocations outstanding</div>
<div>SMF.s0.g_bytes 639942656 . Bytes outstanding</div><div>SMF.s0.g_space 2006028288 . Bytes available</div><div>SMF.s0.g_smf 16753 . N struct smf</div><div>
SMF.s0.g_smf_frag 1982 . N small free smf</div>
<div>SMF.s0.g_smf_large 50 . N large free smf</div><div>SMA.Transient.c_req 41668 1.82 Allocator requests</div><div>SMA.Transient.c_fail 0 0.00 Allocator failures</div>
<div>SMA.Transient.c_bytes 215142059 9377.24 Bytes allocated</div><div>SMA.Transient.c_freed 215142059 9377.24 Bytes freed</div><div>SMA.Transient.g_alloc 0 . Allocations outstanding</div>
<div>SMA.Transient.g_bytes 0 . Bytes outstanding</div><div>SMA.Transient.g_space 0 . Bytes available</div><div>VBE.default(127.0.0.1,,8081).vcls 1 . VCL references</div>
<div>VBE.default(127.0.0.1,,8081).happy 0 . Happy health probes</div></div><div><br></div><div><div dir="ltr"><div><br></div><div><font color="#999999">Atenciosamente,</font></div><div><font color="#999999">Fábio Fraga Machado</font></div>
<div><font color="#999999"><br></font></div><div><font color="#999999">: Telefone: (48) 4052-9252</font></div><div><font color="#999999">: MSN: </font><span style="color:rgb(153,153,153)"> </span><a href="mailto:fabio@dataspace.com.br" target="_blank">fabio@dataspace.com.br</a></div>
<div><font color="#999999">: GTalk: <a href="mailto:fabio@dataspace.com.br" target="_blank">fabio@dataspace.com.br</a></font></div></div></div>
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