I have occasionally seen a problem where my Moodle server takes over a minute to load. While we've had disk-based performance problems in the past that locked up the whole server, this seems to be different, because I can ssh in and the server is perfectly responsive, showing a load average of almost nothing.
I'd assumed that this was something that at least manifested site-wide, but I just had a co-worker report that she was experiencing the problem while I was able to load the site with no issues at all.
I happened to have the stats footer info turned on, and comparing her stats to mine, mine show more memory use, more db writes, etc. In fact, the only things that seem to be higher in hers are the load time and ticks.
Maybe this is just some kind of bizarre issue with dns or something, but while I look into it I thought I'd ask here if this sounds familiar to anyone. Open to suggestions for troubleshooting!
Also worth noting: she tried to load the page in a different browser and had the same delay, even as it kept loading without issue for me.
Here's the performance info I gathered...
Hers:
105.783156 secs RAM: 47.4MB RAM peak: 56MB Included 369 files Contexts for which filters were loaded: 2 Filters created: 2 Pieces of content filtered: 2 Strings filtered: 0 get_string calls: 269 strings mem cache hits: 230 strings disk cache hits: 39 Included YUI modules: 54 Other JavaScript modules: 2 DB reads/writes: 316/4 ticks: 10579 user: 36 sys: 9 cuser: 0 csys: 0 Load average: 0.13 Session: 35KB
Mine:
0.772878 secs RAM: 70.1MB RAM peak: 70.4MB Included 1022 files Contexts for which filters were loaded: 2 Filters created: 2 Pieces of content filtered: 2 Strings filtered: 0 get_string calls: 1558 strings mem cache hits: 1362 strings disk cache hits: 196 Included YUI modules: 54 Other JavaScript modules: 2 DB reads/writes: 428/2 ticks: 77 user: 48 sys: 9 cuser: 0 csys: 0 Load average: 0.02 Session: 51.3KB