Give some days, so customers won't complain...
I realised something strange testing again the database server (explained
below).
Is there any kernel related explanation? Or the test is no reliable?
Just for curiosity, I did the same dbase test again among 2.2.9 and
2.2.10.
2.2.9 is a little faster (or better to say, consumes less CPU), about 2%.
I also noticed the biggest differences are in sys and user times. Sys
times in 2.2.10 are about 10% larger than in 2.2.9. I did not find the
reason in the patch, may be in VFS or TCP changes? All accessed data was
loaded to the page cache (about 150 MB in 450MB free RAM).
The database server I am using does an accept on a TCP socket (only one ip
address), which in the 80% was established from a client in the same
machine (the other 20% from a PII UP running 2.2.9). The server does a a
fork for each new connection.
The "signature" of the process is as follows (snapshot from 2.2.10 after
70.000 operations)
PID TTY MAJFLT MINFLT TRS DRS SIZE SWAP RSS SHRD LIB DT COMMAND
138 ? 37 278889 16 44 208 148 60 44 0 4 /usr/sbin/dbserver_sql
total used free shared buffers cached
Mem: 517320 500860 16460 25392 96228 365952
-/+ buffers/cache: 38680 478640
Swap: 129004 3632 125372
** Parent Times
User: 00:00:02.07 Sys: 00:00:37.47 Total: 00:00:39.54
** Total Times
User: 00:19:04.77 Sys: 00:15:16.19 Total: 00:34:20.96
-- Ricardo Galli
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