looks like DBI stops talking to mysql
when this happens, is apache hanging?
or does it just crash on one page, and then continually crash on
subsequent pages?
a few ideas:
a
are you using the same dh / $dbh for session as the rest of
your site?
if so, try creating a new mysql db for sessions only.
there could be some locking issue caused by other queries.
b
are you using Apache::DBI or another persistence provider?
i'm thinking that *maybe* you're not, and mysql is unhappy that
you're slamming it with constant connects.
c
if this is a dev box, try enabling the query log and slow log in
mysql, and enable tracing in DBI
if you can reproduce, see if mysql is logging it as a slow log, and
see if mysql or DBI did something that didn't unlock a table
be warned though - mysql query log can grow gigantic, and DBI
tracing can be verbose
d
assuming you're on a nix/bsd ( there were some files in the root of
that page that suggested such) tail the logs while you stresstest.
On Feb 26, 2006, at 4:29 PM, Todd W wrote:
Apache::Session is occasionally hanging pages. If I stop the
server, I find
the following in the error log:
http://waveright.homeip.net/~trwww/code/pmsi/4tp-bug.txt
using pre and post statment warn()s, I found that the line that
causes the
hang is:
eval {
tie %{$session}, 'Apache::Session::MySQL', $session_key,
{ Handle => $dbh, LockHandle => $dbh } ;
} ;
The only way I can "duplicate" it is by pounding the sever with ab.
Once it hangs, it says hung ( can't make any other requests ). A
restart
always gets it going agian.
Thanks in advance for any advice!
Todd W.
