You are viewing a plain text version of this content. The canonical link for it is here.
Posted to dev@httpd.apache.org by Apache Dev <ap...@mcarlson.com> on 2007/10/21 12:29:25 UTC
Apache 2.2 MPM Worker Virtual Memory Usage
I tried asking this on the users mailing list. But, I think it is beyond
that list.
There appears to be a significant difference between Apache 2.2 MPM
Worker and MPM Perfork virtual memory usage. As well as between Apache
2.2 MPM Worker and Apache 1.3 virtual memory usage. This can become an
issue in a VPS (virtual private server) environment where resources are
more constrained. Privvmpages is limited in this environment. The impact
here is that some VPS users simply cannot run the Worker MPM. Which is
unfortunate.
I am seeing 280MB vs 5.8MB of VM usage per process. You could argue that
worker is supposed to use more virtual memory, as running multiple
threads per process it actually uses less. But, that is not the case.
Total VPS privvmpages is 2.1GB vs 358MB. What is really interesting here
is why is it so much higher. You would expect some increase but it looks
like most (if not all) of the virtual memory of each of the 7 worker
processes is not shared. 7 * 280MB = 2GB. Which means it can't be code.
I don't see how it could be this much code anyway. So then what is it?
(Conversely most of the 2.2 perfork virtual memory is shared code. 150 *
5.8MB = 850MB,which is more than 358MB for the entire VPS.) Is the code
building some kind of large local process database? Anyway to turn it off?
Note I do not have PHP or any other programmatic modules loaded. See
below for configure info.
Thanks...
#
# Apache 2.2 Worker Thread Memory Usage
#
# Process data.
5 99 28344 28338 20 0 5772 1772 - S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 28347 28338 20 0 282496 2020 pipe_w Sl ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 28349 28338 22 0 282496 2020 pipe_w Sl ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 28351 28338 22 0 282496 2020 pipe_w Sl ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 28352 28338 22 0 282496 2020 pipe_w Sl ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 28360 28338 20 0 282496 2020 pipe_w Sl ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 30684 28338 15 0 282496 2020 pipe_w Sl ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 0 28338 1 16 0 5868 2468 - Ss ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 28345 28338 20 0 282632 2660 pipe_w Sl ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
# Vpsstat data.
+--------------+------------+------------+------------+------------+----------+
| Resource | Current | Recent Max | Barrier | Limit |
Failures |
+--------------+------------+------------+------------+------------+----------+
Primary Parameters
+--------------+------------+------------+------------+------------+----------+
| all memory | 157.0 MB | n/a | 1024.0 MB | n/a
| n/a |
| vmguarpages | n/a | n/a | 256.0 MB | n/a
| 0 |
| oomguarpages | 146.4 MB | 146.5 MB | n/a | n/a
| 0 |
| privvmpages | 2.1 GB | 2.1 GB | n/a | n/a
| 0 |
| physpages | 146.4 MB | 146.5 MB | n/a | n/a
| 0 |
+--------------+------------+------------+------------+------------+----------+
Secondary Parameters
+--------------+------------+------------+------------+------------+----------+
| kmemsize | 9.8 MB | 9.9 MB | 2.0 GB | 2.0 GB
| 0 |
| tcpsndbuf | 423.6 kB | 423.6 kB | 2.0 GB | 2.0 GB
| 0 |
| tcprcvbuf | 562.2 kB | 562.2 kB | 2.0 GB | 2.0 GB
| 0 |
| othersockbuf | 94.4 kB | 94.4 kB | 2.0 GB | 2.0 GB
| 0 |
| dgramrcvbuf | 0 B | 0 B | 2.0 GB | 2.0 GB
| 0 |
| shmpages | 5.2 MB | 5.2 MB | n/a | n/a
| 0 |
| lockedpages | 0 B | 0 B | n/a | n/a
| 0 |
+--------------+------------+------------+------------+------------+----------+
Auxiliary Parameters
+--------------+------------+------------+------------+------------+----------+
| numproc | 271 | 272 | n/a | 400
| 0 |
| numtcpsock | 35 | 35 | n/a | 500
| 0 |
| numothersock | 70 | 70 | n/a | 500
| 0 |
| numfile | 5663 | 5680 | n/a | 8192
| 0 |
| numflock | 9 | 9 | 200 | 220
| 0 |
| numpty | 2 | 2 | n/a | 64
| 0 |
| numiptent | 75 | 75 | n/a | 500
| 0 |
+--------------+------------+------------+------------+------------+----------+
# Configure options.
CFLAGS/CPPFLAGS = -pipe -Os -march=pentium4
./configure
--enable-deflate
--enable-expires
--enable-headers
--enable-imagemap
--enable-logio
--enable-nonportable-atomics=yes
--enable-rewrite
--enable-ssl
--enable-suexec
--prefix=/usr/local/apache
--with-included-apr
--with-mpm=worker
--with-ssl=/usr
--with-suexec-caller=nobody
--with-suexec-docroot=/
--with-suexec-gidmin=100
--with-suexec-logfile=/usr/local/apache/logs/suexec_log
--with-suexec-uidmin=100
--with-suexec-userdir=public_html
#
# Apache 2.2 Prefork Memory Usage
#
# Process data.
5 99 9280 9275 19 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9281 9275 21 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9282 9275 20 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9283 9275 20 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9284 9275 20 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9285 9275 20 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9286 9275 20 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9287 9275 20 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9288 9275 20 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9289 9275 22 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9290 9275 21 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9291 9275 21 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9292 9275 21 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9293 9275 21 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9294 9275 21 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9295 9275 21 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9297 9275 24 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9298 9275 23 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9299 9275 23 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9300 9275 23 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9301 9275 23 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9302 9275 23 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9303 9275 23 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9304 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9305 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9306 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9307 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9308 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9309 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9311 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9312 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9313 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9314 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9315 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9316 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9317 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9318 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9319 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9320 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9321 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9322 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9323 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9324 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9325 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9326 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9327 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9328 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9329 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9330 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9331 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9332 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9333 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9334 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9335 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9336 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9337 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9338 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9339 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9340 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9341 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9342 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9343 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9344 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9345 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9346 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9348 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9349 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9350 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9351 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9352 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9354 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9355 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9356 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9357 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9358 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9359 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9360 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9361 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9362 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9363 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9364 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9365 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9366 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9368 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9369 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9370 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9371 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9372 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9373 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9374 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9375 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9376 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9378 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9379 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9380 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9381 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9382 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9384 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9385 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9386 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9390 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9391 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9392 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9393 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9394 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9395 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9396 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9397 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9398 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9399 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9400 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9401 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9402 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9403 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9404 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9410 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9411 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9412 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9413 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9414 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9415 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9416 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9417 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9418 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9419 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9420 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9421 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9422 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9423 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9424 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9427 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9429 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9430 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9431 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9432 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9433 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9435 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9437 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9438 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9439 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9441 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9442 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9443 9275 25 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 11611 9275 15 0 5836 1792 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9279 9275 16 0 5836 1796 - S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9310 9275 25 0 5836 1796 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9367 9275 25 0 5836 1796 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9388 9275 25 0 5836 1796 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9278 9275 17 0 5848 2188 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9276 9275 16 0 5836 2276 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 99 9277 9275 16 0 5836 2276 semtim S ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
5 0 9275 1 16 0 5704 2304 - Ss ? 0:00
/usr/local/apache/bin/httpd -k start -DSSL
# Vpsstat data.
+--------------+------------+------------+------------+------------+----------+
| Resource | Current | Recent Max | Barrier | Limit |
Failures |
+--------------+------------+------------+------------+------------+----------+
Primary Parameters
+--------------+------------+------------+------------+------------+----------+
| all memory | 175.8 MB | n/a | 1024.0 MB | n/a
| n/a |
| vmguarpages | n/a | n/a | 256.0 MB | n/a
| 0 |
| oomguarpages | 158.7 MB | 158.9 MB | n/a | n/a
| 0 |
| privvmpages | 357.9 MB | 358.8 MB | n/a | n/a
| 0 |
| physpages | 158.7 MB | 158.9 MB | n/a | n/a
| 0 |
+--------------+------------+------------+------------+------------+----------+
Secondary Parameters
+--------------+------------+------------+------------+------------+----------+
| kmemsize | 16.3 MB | 16.4 MB | 2.0 GB | 2.0 GB
| 0 |
| tcpsndbuf | 329.7 kB | 329.7 kB | 2.0 GB | 2.0 GB
| 0 |
| tcprcvbuf | 480.0 kB | 480.0 kB | 2.0 GB | 2.0 GB
| 0 |
| othersockbuf | 54.1 kB | 54.1 kB | 2.0 GB | 2.0 GB
| 0 |
| dgramrcvbuf | 0 B | 0 B | 2.0 GB | 2.0 GB
| 0 |
| shmpages | 5.1 MB | 5.1 MB | n/a | n/a
| 0 |
| lockedpages | 0 B | 0 B | n/a | n/a
| 0 |
+--------------+------------+------------+------------+------------+----------+
Auxiliary Parameters
+--------------+------------+------------+------------+------------+----------+
| numproc | 222 | 223 | n/a | 400
| 0 |
| numtcpsock | 30 | 30 | n/a | 500
| 0 |
| numothersock | 51 | 51 | n/a | 500
| 0 |
| numfile | 3665 | 3682 | n/a | 8192
| 0 |
| numflock | 9 | 9 | 200 | 220
| 0 |
| numpty | 2 | 2 | n/a | 64
| 0 |
| numiptent | 75 | 75 | n/a | 500
| 0 |
+--------------+------------+------------+------------+------------+----------+
Re: Apache 2.2 MPM Worker Virtual Memory Usage
Posted by Apache Dev <ap...@mcarlson.com>.
The default of 25 threads. 8MB * 25 = 200MB. Very helpful. Stack size.
Doh. Why didn't I think of that. This should of course affect Prefork as
well. The stack size must be less than 10MB with it. Does Apache change
the stack size with Prefork? Or, is Linux handling the VM needs differently?
I lowered ThreadStackSize down to 2MB from 10MB. How low can I go here
without any programmatic modules (PHP, etc...) loaded?
Thanks...
StartServers 3
MaxClients 300
MinSpareThreads 75
MaxSpareThreads 250
ThreadsPerChild 25
MaxRequestsPerChild 0
root@vps [/usr/local/apache/conf/extra]# ulimit -a
core file size (blocks, -c) 0
data seg size (kbytes, -d) unlimited
file size (blocks, -f) unlimited
pending signals (-i) 1024
max locked memory (kbytes, -l) 32
max memory size (kbytes, -m) unlimited
open files (-n) 1024
pipe size (512 bytes, -p) 8
POSIX message queues (bytes, -q) 819200
stack size (kbytes, -s) 10240
cpu time (seconds, -t) unlimited
max user processes (-u) 71680
virtual memory (kbytes, -v) unlimited
file locks (-x) unlimited
# 10MB stack size
root@vps [/usr/local/apache/conf/extra]# pmap -x 9956
9956: /usr/local/apache/bin/httpd -k start -DSSL
Address Kbytes RSS Anon Locked Mode Mapping
08048000 544 - - - r-x-- httpd
080d0000 16 - - - rw--- httpd
080d4000 1232 - - - rw--- [ anon ]
a6d7f000 16 - - - r-x-- libnss_dns-2.3.4.so
a6d83000 4 - - - r---- libnss_dns-2.3.4.so
a6d84000 4 - - - rw--- libnss_dns-2.3.4.so
a6d85000 36 - - - r-x-- libgcc_s-3.4.6-20060404.so.1
a6d8e000 4 - - - rw--- libgcc_s-3.4.6-20060404.so.1
a6d9a000 4 - - - ----- [ anon ]
a6d9b000 10240 - - - rw--- [ anon ]
a779b000 4 - - - ----- [ anon ]
a779c000 10240 - - - rw--- [ anon ]
a819c000 4 - - - ----- [ anon ]
a819d000 10240 - - - rw--- [ anon ]
a8b9d000 4 - - - ----- [ anon ]
a8b9e000 10240 - - - rw--- [ anon ]
a959e000 4 - - - ----- [ anon ]
a959f000 10240 - - - rw--- [ anon ]
a9f9f000 4 - - - ----- [ anon ]
a9fa0000 10240 - - - rw--- [ anon ]
aa9a0000 4 - - - ----- [ anon ]
aa9a1000 10240 - - - rw--- [ anon ]
ab3a1000 4 - - - ----- [ anon ]
ab3a2000 10240 - - - rw--- [ anon ]
abda2000 4 - - - ----- [ anon ]
abda3000 10240 - - - rw--- [ anon ]
ac7a3000 4 - - - ----- [ anon ]
ac7a4000 10240 - - - rw--- [ anon ]
ad1a4000 4 - - - ----- [ anon ]
ad1a5000 10240 - - - rw--- [ anon ]
adba5000 4 - - - ----- [ anon ]
adba6000 10240 - - - rw--- [ anon ]
ae5a6000 4 - - - ----- [ anon ]
ae5a7000 10240 - - - rw--- [ anon ]
aefa7000 4 - - - ----- [ anon ]
aefa8000 10240 - - - rw--- [ anon ]
af9a8000 4 - - - ----- [ anon ]
af9a9000 10240 - - - rw--- [ anon ]
b03a9000 4 - - - ----- [ anon ]
b03aa000 10240 - - - rw--- [ anon ]
b0daa000 4 - - - ----- [ anon ]
b0dab000 10240 - - - rw--- [ anon ]
b17ab000 4 - - - ----- [ anon ]
b17ac000 10240 - - - rw--- [ anon ]
b21ac000 4 - - - ----- [ anon ]
b21ad000 10240 - - - rw--- [ anon ]
b2bad000 4 - - - ----- [ anon ]
b2bae000 10240 - - - rw--- [ anon ]
b35ae000 4 - - - ----- [ anon ]
b35af000 10240 - - - rw--- [ anon ]
b3faf000 4 - - - ----- [ anon ]
b3fb0000 10240 - - - rw--- [ anon ]
b49b0000 4 - - - ----- [ anon ]
b49b1000 10240 - - - rw--- [ anon ]
b53b1000 4 - - - ----- [ anon ]
b53b2000 10240 - - - rw--- [ anon ]
b5db2000 4 - - - ----- [ anon ]
b5db3000 10240 - - - rw--- [ anon ]
b67b3000 4 - - - ----- [ anon ]
b67b4000 10240 - - - rw--- [ anon ]
b71b4000 4 - - - ----- [ anon ]
b71b5000 10240 - - - rw--- [ anon ]
b7bb5000 228 - - - rw-s- [ anon ]
b7bee000 36 - - - r-x-- libnss_files-2.3.4.so
b7bf7000 4 - - - r---- libnss_files-2.3.4.so
b7bf8000 4 - - - rw--- libnss_files-2.3.4.so
b7c04000 8 - - - rw--- [ anon ]
b7c06000 1176 - - - r-x-- libc-2.3.4.so
b7d2c000 8 - - - r---- libc-2.3.4.so
b7d2e000 8 - - - rw--- libc-2.3.4.so
b7d30000 8 - - - rw--- [ anon ]
b7d32000 8 - - - r-x-- libdl-2.3.4.so
b7d34000 4 - - - r---- libdl-2.3.4.so
b7d35000 4 - - - rw--- libdl-2.3.4.so
b7d36000 56 - - - r-x-- libpthread-2.3.4.so
b7d44000 4 - - - r---- libpthread-2.3.4.so
b7d45000 4 - - - rw--- libpthread-2.3.4.so
b7d46000 8 - - - rw--- [ anon ]
b7d48000 20 - - - r-x-- libcrypt-2.3.4.so
b7d4d000 4 - - - r---- libcrypt-2.3.4.so
b7d4e000 4 - - - rw--- libcrypt-2.3.4.so
b7d4f000 156 - - - rw--- [ anon ]
b7d76000 32 - - - r-x-- librt-2.3.4.so
b7d7e000 4 - - - r---- librt-2.3.4.so
b7d7f000 4 - - - rw--- librt-2.3.4.so
b7d80000 44 - - - rw--- [ anon ]
b7d8b000 8 - - - r-x-- libuuid.so.1.2
b7d8d000 4 - - - rw--- libuuid.so.1.2
b7d8e000 112 - - - r-x-- libapr-1.so.0.2.11
b7daa000 4 - - - rw--- libapr-1.so.0.2.11
b7dab000 112 - - - r-x-- libexpat.so.0.5.0
b7dc7000 8 - - - rw--- libexpat.so.0.5.0
b7dc9000 68 - - - r-x-- libaprutil-1.so.0.2.11
b7dda000 4 - - - rw--- libaprutil-1.so.0.2.11
b7ddb000 132 - - - r-x-- libm-2.3.4.so
b7dfc000 4 - - - r---- libm-2.3.4.so
b7dfd000 4 - - - rw--- libm-2.3.4.so
b7dfe000 60 - - - r-x-- libz.so.1.2.1.2
b7e0d000 4 - - - rw--- libz.so.1.2.1.2
b7e0e000 4 - - - rw--- [ anon ]
b7e0f000 60 - - - r-x-- libresolv-2.3.4.so
b7e1e000 4 - - - r---- libresolv-2.3.4.so
b7e1f000 4 - - - rw--- libresolv-2.3.4.so
b7e20000 8 - - - rw--- [ anon ]
b7e22000 128 - - - r-x-- libk5crypto.so.3.0
b7e42000 4 - - - rw--- libk5crypto.so.3.0
b7e43000 8 - - - r-x-- libcom_err.so.2.1
b7e45000 4 - - - rw--- libcom_err.so.2.1
b7e46000 396 - - - r-x-- libkrb5.so.3.2
b7ea9000 8 - - - rw--- libkrb5.so.3.2
b7eab000 76 - - - r-x-- libgssapi_krb5.so.2.2
b7ebe000 4 - - - rw--- libgssapi_krb5.so.2.2
b7ebf000 848 - - - r-x-- libcrypto.so.0.9.7a
b7f93000 72 - - - rw--- libcrypto.so.0.9.7a
b7fa5000 16 - - - rw--- [ anon ]
b7fa9000 196 - - - r-x-- libssl.so.0.9.7a
b7fda000 12 - - - rw--- libssl.so.0.9.7a
b7fe4000 4 - - - r-x-- mod_bwlimited.so
b7fe5000 4 - - - rw--- mod_bwlimited.so
b7fe6000 4 - - - r-x-- mod_auth_passthrough.so
b7fe7000 4 - - - rw--- mod_auth_passthrough.so
b7fe8000 88 - - - r-x-- ld-2.3.4.so
b7ffe000 4 - - - r---- ld-2.3.4.so
b7fff000 4 - - - rw--- ld-2.3.4.so
bfff9000 20 - - - rw--- [ stack ]
ffffe000 4 - - - ----- [ anon ]
-------- ------- ------- ------- -------
total kB 282792 - - -
# 2MB stack size
root@vps [/usr/local/apache/conf/extra]# pmap -x 23783
23783: /usr/local/apache/bin/httpd -k start -DSSL
Address Kbytes RSS Anon Locked Mode Mapping
08048000 544 - - - r-x-- httpd
080d0000 16 - - - rw--- httpd
080d4000 964 - - - rw--- [ anon ]
b4585000 36 - - - r-x-- libgcc_s-3.4.6-20060404.so.1
b458e000 4 - - - rw--- libgcc_s-3.4.6-20060404.so.1
b459a000 4 - - - ----- [ anon ]
b459b000 2048 - - - rw--- [ anon ]
b479b000 4 - - - ----- [ anon ]
b479c000 2048 - - - rw--- [ anon ]
b499c000 4 - - - ----- [ anon ]
b499d000 2048 - - - rw--- [ anon ]
b4b9d000 4 - - - ----- [ anon ]
b4b9e000 2048 - - - rw--- [ anon ]
b4d9e000 4 - - - ----- [ anon ]
b4d9f000 2048 - - - rw--- [ anon ]
b4f9f000 4 - - - ----- [ anon ]
b4fa0000 2048 - - - rw--- [ anon ]
b51a0000 4 - - - ----- [ anon ]
b51a1000 2048 - - - rw--- [ anon ]
b53a1000 4 - - - ----- [ anon ]
b53a2000 2048 - - - rw--- [ anon ]
b55a2000 4 - - - ----- [ anon ]
b55a3000 2048 - - - rw--- [ anon ]
b57a3000 4 - - - ----- [ anon ]
b57a4000 2048 - - - rw--- [ anon ]
b59a4000 4 - - - ----- [ anon ]
b59a5000 2048 - - - rw--- [ anon ]
b5ba5000 4 - - - ----- [ anon ]
b5ba6000 2048 - - - rw--- [ anon ]
b5da6000 4 - - - ----- [ anon ]
b5da7000 2048 - - - rw--- [ anon ]
b5fa7000 4 - - - ----- [ anon ]
b5fa8000 2048 - - - rw--- [ anon ]
b61a8000 4 - - - ----- [ anon ]
b61a9000 2048 - - - rw--- [ anon ]
b63a9000 4 - - - ----- [ anon ]
b63aa000 2048 - - - rw--- [ anon ]
b65aa000 4 - - - ----- [ anon ]
b65ab000 2048 - - - rw--- [ anon ]
b67ab000 4 - - - ----- [ anon ]
b67ac000 2048 - - - rw--- [ anon ]
b69ac000 4 - - - ----- [ anon ]
b69ad000 2048 - - - rw--- [ anon ]
b6bad000 4 - - - ----- [ anon ]
b6bae000 2048 - - - rw--- [ anon ]
b6dae000 4 - - - ----- [ anon ]
b6daf000 2048 - - - rw--- [ anon ]
b6faf000 4 - - - ----- [ anon ]
b6fb0000 2048 - - - rw--- [ anon ]
b71b0000 4 - - - ----- [ anon ]
b71b1000 2048 - - - rw--- [ anon ]
b73b1000 4 - - - ----- [ anon ]
b73b2000 2048 - - - rw--- [ anon ]
b75b2000 4 - - - ----- [ anon ]
b75b3000 2048 - - - rw--- [ anon ]
b77b3000 4 - - - ----- [ anon ]
b77b4000 2048 - - - rw--- [ anon ]
b79b4000 4 - - - ----- [ anon ]
b79b5000 2048 - - - rw--- [ anon ]
b7bb5000 228 - - - rw-s- [ anon ]
b7bee000 36 - - - r-x-- libnss_files-2.3.4.so
b7bf7000 4 - - - r---- libnss_files-2.3.4.so
b7bf8000 4 - - - rw--- libnss_files-2.3.4.so
b7c04000 8 - - - rw--- [ anon ]
b7c06000 1176 - - - r-x-- libc-2.3.4.so
b7d2c000 8 - - - r---- libc-2.3.4.so
b7d2e000 8 - - - rw--- libc-2.3.4.so
b7d30000 8 - - - rw--- [ anon ]
b7d32000 8 - - - r-x-- libdl-2.3.4.so
b7d34000 4 - - - r---- libdl-2.3.4.so
b7d35000 4 - - - rw--- libdl-2.3.4.so
b7d36000 56 - - - r-x-- libpthread-2.3.4.so
b7d44000 4 - - - r---- libpthread-2.3.4.so
b7d45000 4 - - - rw--- libpthread-2.3.4.so
b7d46000 8 - - - rw--- [ anon ]
b7d48000 20 - - - r-x-- libcrypt-2.3.4.so
b7d4d000 4 - - - r---- libcrypt-2.3.4.so
b7d4e000 4 - - - rw--- libcrypt-2.3.4.so
b7d4f000 156 - - - rw--- [ anon ]
b7d76000 32 - - - r-x-- librt-2.3.4.so
b7d7e000 4 - - - r---- librt-2.3.4.so
b7d7f000 4 - - - rw--- librt-2.3.4.so
b7d80000 44 - - - rw--- [ anon ]
b7d8b000 8 - - - r-x-- libuuid.so.1.2
b7d8d000 4 - - - rw--- libuuid.so.1.2
b7d8e000 112 - - - r-x-- libapr-1.so.0.2.11
b7daa000 4 - - - rw--- libapr-1.so.0.2.11
b7dab000 112 - - - r-x-- libexpat.so.0.5.0
b7dc7000 8 - - - rw--- libexpat.so.0.5.0
b7dc9000 68 - - - r-x-- libaprutil-1.so.0.2.11
b7dda000 4 - - - rw--- libaprutil-1.so.0.2.11
b7ddb000 132 - - - r-x-- libm-2.3.4.so
b7dfc000 4 - - - r---- libm-2.3.4.so
b7dfd000 4 - - - rw--- libm-2.3.4.so
b7dfe000 60 - - - r-x-- libz.so.1.2.1.2
b7e0d000 4 - - - rw--- libz.so.1.2.1.2
b7e0e000 4 - - - rw--- [ anon ]
b7e0f000 60 - - - r-x-- libresolv-2.3.4.so
b7e1e000 4 - - - r---- libresolv-2.3.4.so
b7e1f000 4 - - - rw--- libresolv-2.3.4.so
b7e20000 8 - - - rw--- [ anon ]
b7e22000 128 - - - r-x-- libk5crypto.so.3.0
b7e42000 4 - - - rw--- libk5crypto.so.3.0
b7e43000 8 - - - r-x-- libcom_err.so.2.1
b7e45000 4 - - - rw--- libcom_err.so.2.1
b7e46000 396 - - - r-x-- libkrb5.so.3.2
b7ea9000 8 - - - rw--- libkrb5.so.3.2
b7eab000 76 - - - r-x-- libgssapi_krb5.so.2.2
b7ebe000 4 - - - rw--- libgssapi_krb5.so.2.2
b7ebf000 848 - - - r-x-- libcrypto.so.0.9.7a
b7f93000 72 - - - rw--- libcrypto.so.0.9.7a
b7fa5000 16 - - - rw--- [ anon ]
b7fa9000 196 - - - r-x-- libssl.so.0.9.7a
b7fda000 12 - - - rw--- libssl.so.0.9.7a
b7fe4000 4 - - - r-x-- mod_bwlimited.so
b7fe5000 4 - - - rw--- mod_bwlimited.so
b7fe6000 4 - - - r-x-- mod_auth_passthrough.so
b7fe7000 4 - - - rw--- mod_auth_passthrough.so
b7fe8000 88 - - - r-x-- ld-2.3.4.so
b7ffe000 4 - - - r---- ld-2.3.4.so
b7fff000 4 - - - rw--- ld-2.3.4.so
bfff9000 20 - - - rw--- [ stack ]
ffffe000 4 - - - ----- [ anon ]
-------- ------- ------- ------- -------
total kB 61316 - - -
Ruediger Pluem wrote:
> What is your setting for ThreadsPerChild?
>
> On my Linux each thread consumes 8MB of virtual memory (I assume for stack and other
> thread private data) as shown by pmap. This can sum up to a large amount of memory.
>
> Regards
>
> Rüdiger
>
>
>
> On 10/21/2007 12:29 PM, Apache Dev wrote:
>> I tried asking this on the users mailing list. But, I think it is beyond
>> that list.
>>
>> There appears to be a significant difference between Apache 2.2 MPM
>> Worker and MPM Perfork virtual memory usage. As well as between Apache
>> 2.2 MPM Worker and Apache 1.3 virtual memory usage. This can become an
>> issue in a VPS (virtual private server) environment where resources are
>> more constrained. Privvmpages is limited in this environment. The impact
>> here is that some VPS users simply cannot run the Worker MPM. Which is
>> unfortunate.
>>
>> I am seeing 280MB vs 5.8MB of VM usage per process. You could argue that
>> worker is supposed to use more virtual memory, as running multiple
>> threads per process it actually uses less. But, that is not the case.
>> Total VPS privvmpages is 2.1GB vs 358MB. What is really interesting here
>> is why is it so much higher. You would expect some increase but it looks
>> like most (if not all) of the virtual memory of each of the 7 worker
>> processes is not shared. 7 * 280MB = 2GB. Which means it can't be code.
>> I don't see how it could be this much code anyway. So then what is it?
>> (Conversely most of the 2.2 perfork virtual memory is shared code. 150 *
>> 5.8MB = 850MB,which is more than 358MB for the entire VPS.) Is the code
>> building some kind of large local process database? Anyway to turn it off?
>>
>> Note I do not have PHP or any other programmatic modules loaded. See
>> below for configure info.
>>
>> Thanks...
>>
Re: Apache 2.2 MPM Worker Virtual Memory Usage
Posted by Niklas Edmundsson <ni...@acc.umu.se>.
On Sun, 21 Oct 2007, Ruediger Pluem wrote:
> What is your setting for ThreadsPerChild?
>
> On my Linux each thread consumes 8MB of virtual memory (I assume for
> stack and other thread private data) as shown by pmap. This can sum
> up to a large amount of memory.
This is due to linux libc setting the thread stack size using the
stack resource limit. We have the following in our apache httpd
startup script:
# NPTL (modern Linux threads) defaults the thread stack size to the setting
# of your stack resource limit. The system-wide default for this is 8MB,
# which is waaay exaggerated when running httpd.
# 512kB should be more than enough (AIX manages on 96kB, Netware on 64kB).
ulimit -s 512
We didn't bother with trying to lower it more, but I've run the same
httpd config on IBM AIX 5.1 with the default 96kB thread stack size
without problems.
This could probably be worked around in httpd/APR by calling setrlimit
before starting the threads, however I think it's probably better to
just document this Linux thread bogosity and let vendors fix their
httpd startup scripts though.
/Nikke
--
-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-
Niklas Edmundsson, Admin @ {acc,hpc2n}.umu.se | nikke@acc.umu.se
---------------------------------------------------------------------------
No boom now. Boom tomorrow...there's ALWAYS a boom tomorrow...BOOM!
=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
Re: Apache 2.2 MPM Worker Virtual Memory Usage
Posted by Ruediger Pluem <rp...@apache.org>.
What is your setting for ThreadsPerChild?
On my Linux each thread consumes 8MB of virtual memory (I assume for stack and other
thread private data) as shown by pmap. This can sum up to a large amount of memory.
Regards
Rüdiger
On 10/21/2007 12:29 PM, Apache Dev wrote:
>
> I tried asking this on the users mailing list. But, I think it is beyond
> that list.
>
> There appears to be a significant difference between Apache 2.2 MPM
> Worker and MPM Perfork virtual memory usage. As well as between Apache
> 2.2 MPM Worker and Apache 1.3 virtual memory usage. This can become an
> issue in a VPS (virtual private server) environment where resources are
> more constrained. Privvmpages is limited in this environment. The impact
> here is that some VPS users simply cannot run the Worker MPM. Which is
> unfortunate.
>
> I am seeing 280MB vs 5.8MB of VM usage per process. You could argue that
> worker is supposed to use more virtual memory, as running multiple
> threads per process it actually uses less. But, that is not the case.
> Total VPS privvmpages is 2.1GB vs 358MB. What is really interesting here
> is why is it so much higher. You would expect some increase but it looks
> like most (if not all) of the virtual memory of each of the 7 worker
> processes is not shared. 7 * 280MB = 2GB. Which means it can't be code.
> I don't see how it could be this much code anyway. So then what is it?
> (Conversely most of the 2.2 perfork virtual memory is shared code. 150 *
> 5.8MB = 850MB,which is more than 358MB for the entire VPS.) Is the code
> building some kind of large local process database? Anyway to turn it off?
>
> Note I do not have PHP or any other programmatic modules loaded. See
> below for configure info.
>
> Thanks...
>