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Help with optimization...
Hi everyone, I'm looking for some advice optimizing a site for authenticated users.
VPS with 2GB RAM
Pressflow 6.19
80 modules (including OG, Views, CCK & GMap)
3,500 nodes
Averaging 115,000 page views per month
MySQL using InnoDB tables
Memcache (84% hit rate)
APC (set to 64 M)
MySQL setup is:
key_buffer = 32M
sort_buffer_size = 16M
read_buffer_size = 16M
read_rnd_buffer_size = 16M
myisam_sort_buffer_size = 16M
query_cache_size = 32M
innodb_buffer_pool_size = 1G
innodb_additional_mem_pool_size = 8M
innodb_log_file_size = 256M
innodb_log_files_in_group = 3
Strange cookies passing Varnish
I am seeing some odd cookies in a client's production environment that I cannot find anywhere in the Drupal code. Anyone seen this? What is the best approach to address this? I thought about configuring Varnish to only allow certain cookies to pass, and not pass any all other requests, but that does not seem like a good approach. Any ideas?
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Path_alias_cache incompatible with Pressflow external caching mode?
pressflow and varnish work best together with external caching turned on, correct?
but External caching mode skips boot and exit hooks.
However, path_alias_cache uses hook_exit to set the paths into cache.
Are these two modes incompatible?
i.e. does varnish caching with external preclude path alias caching?
If not, any ideas what I'm missing? If so, anyone have a workaround?
Read moreBeing Kicked from High Performance Host for "Resource Abuse"- Help Requested!
Hello-
I have a community site that relies heavily on Domain Access and Date/Calendar along with some custom Panels and of course, a lot of CCK/Views.
I switched my site over to a "high performance" host back in July using Pressflow, Aegir and NGinx that claimed to handle everything for high performance sites... and I'm being booted for using too many resources.
My site is live but has relatively few "real" visitors but a lot of spider traffic and tons of nodes. (I have a lot of repeating events far into the future.)
Read moreScaling Drupal: Varnish Administration Course in New York City
Hello Drupalistas!
We want to invite you to work side-by-side with the creators of the Varnish cache software and learn how to use Varnish so you can scale your Drupal site!
Varnish Software is on tour in United States and we will hold a training session on Varnish Administration tailored towards Drupal users.
If you would like to assist to this training please let us know as soon as possible by signing up for this event. We will be holding this event centrally in New York City.
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GlusterFS with Boost - any known good methods?
We frequently use GlusterFS ( http://www.gluster.org ) in load balanced clusters to synchronise the /files directory between the web heads. That works great but we haven't found (or investigated fully) a method that the Boost module could be used easily alongside? I'm hoping someone's already doing it and can provide a proven working example.
Boost in this scenario is being used to complement memcache and standard page caching to provide static page delivery for high volumes of anonymous users, open to other equivalent suggestions appropriate to the environment too.
Read moreEnabling APC Results in 500 Internal Server Error
I've installed/enabled APC on a server running CENTOS 5.5 and configured via CPanel. As soon as it's enabled, I cannot access any Drupal page. I just get an Internal Server Error message (500). Any ideas on how to troubleshoot this or what could be going wrong? Below is my configuration.
apc.enable_cli = 1
apc.enable = 1
apc.num_files_hint = 1024
apc.optimization = 0
apc.shm_segments = 1
apc.shm_size = 128
apc.ttl = 7200
apc.user_ttl = 7200
Setting a TTL for CACHE_PERMANENT
Hello,
I am currently experimenting with different cache strategies and came across the following question:
Is it problematic, ignoring cache fragmentation issues, if I enforce a general TTL on CACHE_PERMANENT items, eg. purging every item x hours after its creation?
Clearly, just purging the whole cache does not create any problems, but are there any known problems when cached items disappear one by one?
Thanks,
martin
Performance Issues on Almost Identical Site Even After Moving to a different server
We have two sites. Both are running much slower than I would like. My main issue is to figure out why site #2 is running so terrible by comparison to site #1.
Site #2 is more or less a duplicate of Site #1. We copied site #1 to make site #2 and then changed the content and feel. Site #2 either has always been or has become unbearably slow.
We operate on a virtual machine environment. Both were sitting on the same server. We moved site #2 to a more powerful virtual machine with more memory and processing power.
Site #1
Page execution time was 1694.44 ms.
Correlating resource usage spikes and identifying bottlenecks in large clusters
Recently I was doing some consulting with a fortune 100 company (can't specify any more) who is running a large intranet site with upwards of 90,000 active users.
They are having a couple of issues that I thought the high performance group might have some thoughts on.
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