I'm trying to narrow down the list of suspects of web servers that perform moderately well most of the time with occasional bouts of poor performance. I'm analyzing the data collected and summarized by sar. I've noticed a few things, one of which is high number of tasks in the run queue.

10:15:01 AM   runq-sz  plist-sz   ldavg-1   ldavg-5  ldavg-15   blocked
10:25:01 AM         2       150      0.05      0.05      0.06         0
10:35:01 AM         4       149      0.08      0.12      0.09         0
10:45:01 AM         6       150      0.13      0.19      0.15         0
10:55:01 AM         1       150      0.08      0.10      0.13         0
11:05:01 AM         4       150      0.20      0.35      0.23         0
11:15:01 AM         3       149      0.02      0.09      0.15         0
11:25:01 AM         7       149      0.04      0.05      0.11         0
11:35:01 AM         4       150      0.14      0.15      0.13         0
11:45:01 AM         6       150      0.27      0.18      0.16         0
11:55:01 AM         5       150      0.08      0.10      0.13         0
12:05:01 PM         3       149      0.35      0.40      0.26         0
12:15:01 PM        19       155      0.02      0.10      0.16         1
12:25:01 PM         2       150      0.00      0.07      0.12         0
12:35:02 PM         3       151      0.58      0.24      0.17         0
12:45:01 PM         8       150      0.02      0.13      0.15         0
12:55:01 PM         6       149      0.81      0.29      0.18         0
01:05:01 PM         3       148      0.00      0.09      0.13         0
01:15:01 PM         7       149      0.00      0.04      0.11         0

I believe these are 10 minute averages.

Is this an indicator that the web server is not performing as fast as it could if the average run queue length was lower?