-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 All,
Definitely off-topic, but it's the kind of weird thing someone here might have experience with. I have an offline operation I'm considering bringing "inside" my web-based application. My only concern is memory usage: it requires that a bunch of data be loaded from a db into memory and then analyzed. It doesn't take long to execute -- maybe 10 seconds or so, so the memory can be released back to the rest of the application. I've instrumented the command-line process with a thread which runs every .5sec and captures the used-memory, maintaining a high-water mark and reporting it after the whole operation is done. The first time I ran it (with no specific JVM memory-related settings), it reported that the high-water mark was ~450MiB. I figured that was higher than necessary, and probably just represented a lazy GC with loads of memory, so I constrained the process using -Xmx64M. That resulted in a 16MiB high-water mark. I tried again with -Xmx8M and the high-water mark became 5MiB. Is there a particularly good way to force the GC to be as aggressive as possible to see how low I can go, or should I just keep playing-around with the -Xmx setting. Another option is to serialize my in-memory structure to the disk to get a sense of the size in-memory, though it's really not the same -- it will at least get me in the right ballpark. Any suggestions? Thanks, - -chris -----BEGIN PGP SIGNATURE----- Comment: Using GnuPG with Thunderbird - https://www.enigmail.net/ iQIzBAEBCAAdFiEEMmKgYcQvxMe7tcJcHPApP6U8pFgFAl8DQT8ACgkQHPApP6U8 pFhvJA/+N8CfjjWvBwkXSpAW6gbozyqgcxx0zt5z9TEbC4viCZNAQchlh0WE1jxF dQL2NS6138VNOn45QfVLru7jcVQdk6loRSK4Dxe02neAD6sEwe0v3/zsuu7CDu4x Ln3fwohp+5YNxHAUGc4ssGtw8cilShSSLnJCHwG3mxA+grxg6QvVRVqCxV0b+sCE ocH0MirON5G7b7zETZohtm5lPcghwDy5SBQ4fVo3mLDjUGR8woGr8SL820pQ3BuY rjGrJ7SHxq+rVnhOrtX6c4YdEebhjR963385kwPf1ND0GoeCp8Yk/LgySxBRPAbh 2Kt0UTlbK7wYSDii6kVag1Ayrt5gCyUSrHndvVIl6SdI5gLWfZDbTB3+fvHNg+k5 x/+Xx/YPvDbXv+b7CtO663uIKV+24iaVq94W+0NVacp3P0YmAmK1CZ9ggs7HQ/SC uu3R1wRo4yp7eWszhgfpwPHJBvb9Krtfsr8P6rhs5Ry03pzblkmzzTRCvsE85UEZ 96RN1OGx2YfPEM4+EN9+rxB1hcElLT8V420MAZd9Jx2n8JmJqdZl6DxJ7vgtvKKj 0Y60VaC211M7tzq2zZ5Sh3th3X2tePPoeJQH/vYrreM4snlM8Mt22eQ7jVFri4bY F+mu+8DGP3csWmY16nZ0SQ+ZDUS4E9yEplOHq1YKKyHSYGHjn88= =u12k -----END PGP SIGNATURE----- --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
