Are there any PHP folks on the list who want to step up participation a
bit? I loathe the language but understand it's popular; we get a lot of
questions and need more docs, people helping out, etc.
I'm willing to bet your pecl/memcache client could use an upgrade; I've
seen a lot of reports of this issue happening with the older client.
Also, 1.1.12 is fairly old and has _some_ bugs... I wouldn't be quick to
blame it on your issue though.
Otherwise, you should strace a process that's exhibiting issues and see
what the actual traffic between memcached and your client process looks
like. You can pull the real errors from that, send to the list, and
we'll work from there.
-Dormando
Mauro Maggi wrote:
We got some random errors with Memcached 1.1.12 on a (32-bit) production
server running Debian 4.0r1. The client API is the one provided with php
4.4.4
memcache_set() and memcache_add() randomly fail when trying to set large
values ( > 30kb); the larger the entry length, the larger the number of
failures. Moreover, we get random notices like this one:
"Notice: memcache_get_stats() [function.memcache-get-stats]: Server
192.168.0.13 (tcp 11211) failed with: Failed reading line from stream
(0) in /path/to/script.php"
The same setup on a local developing box, with the same setup, gives us
no failures and everything works ok.
What's wrong in our production box? Is there a way to get an insight on
why the functions are failing, other than their "false" return value?
What follows is the phpinfo() memcached reported configuration and the output
of the memcache_get_advanced_server_stats on our production box:
Revision $Revision: 1.92 $
memcache.allow_failover 1
memcache.chunk_size 8192
memcache.default_port 11211
memcache.hash_function crc32
memcache.hash_strategy standard
memcache.max_failover_attempts 20
----
Server stats:array(19) {
["pid"]=>
string(4) "2735"
["uptime"]=>
string(6) "355498"
["time"]=>
string(10) "1196778820"
["version"]=>
string(6) "1.1.12"
["rusage_user"]=>
string(10) "230.270391"
["rusage_system"]=>
string(10) "452.140257"
["curr_items"]=>
string(7) "1012241"
["total_items"]=>
string(8) "10852467"
["bytes"]=>
string(10) "1429072369"
["curr_connections"]=>
string(3) "469"
["total_connections"]=>
string(7) "6798948"
["connection_structures"]=>
string(3) "654"
["cmd_get"]=>
string(8) "10898327"
["cmd_set"]=>
string(8) "10852467"
["get_hits"]=>
string(7) "8061893"
["get_misses"]=>
string(7) "2836434"
["bytes_read"]=>
string(11) "18236447981"
["bytes_written"]=>
string(11) "14350735133"
["limit_maxbytes"]=>
string(10) "2147483648"
}
