-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 Lance,
On 3/4/19 10:49, Campbell, Lance wrote: > Tomcat 9.x Note that the answer to this is not Tomcat-specific. > What is the easiest way to identify how much memory Tomcat/Java is > currently using from the Java stack -Xss ? Not max but currently > being used. Uh... there is no "maximum stack size". There is only "stack size". Each thread gets a stack of exactly that size. > Is there a particular statement I can put into a servlet to see > what the current memory usage is of the stack? RuntimeMXBean rbean = ManagementFactory.getRuntimeMXBean(); List args = rbean.getInputArguments(); Then look through them for "-Xss" and the accompanying size. The "used stack size" is the number of live threads times that number. I don't know if there is a way to check that it was effective, though. For example, there may be multiple -Xss arguments and the JVM picks one of them to use (probably the last one, but I don't know for sure). Also, there may be some minimum / maximum size that will be chosen if the number is not sane. Or there may be magic numbers like 0 or -1 that mean "the default for the platform" or whatever. YMMV. - -chris -----BEGIN PGP SIGNATURE----- Comment: Using GnuPG with Thunderbird - https://www.enigmail.net/ iQIzBAEBCAAdFiEEMmKgYcQvxMe7tcJcHPApP6U8pFgFAlx+0DwACgkQHPApP6U8 pFhaRQ//e3GW8AlMVxve9LTljwvtHcZcaCsjA4UWyDyi14rLEu4aHClf5mRluxwE F0cvsEThxFIv2mpvY0aijs9Vcu+Uf8qMEncks3LTEPxq5GUoRdTHvO4dIqQh2tLd LVRKBMj7TqeSeQqGjmkgxFHf+F2iuOj34q3LGWzhVbHTn94JOka65nZx75auTySS jv/+pQGTPjJ8WgGCI3NQIlkg4t7+46i2lWI/D3FhFi0h7uqmV31wly4p7Pz1KxZa 6veaGcutwU7V5brl2vF00AXZsQPSlTQYNLEAfvL87S1WrXWeRTel4Xu/PIPKGq3H bDbGeC7fh0KR1Gu7sBNlc9ZPxZs57B250ouvkEJ6wj3VG9RA6/MpdCsES9Mv8Z3m jiwizYnpE2aVKTlH5ID3NPlxH4mCKVl4xxV2JKPeSqBRhnQJkRWE06Mg9XaW6LMv f1GO9TJ5DSL+Qyb+9i29qy47c9oPrOL4I/9ABOkPfDQzc7iUHdfvpZbKg0BCzgSN s9vQbzhl32tsJCskjg8OqY7NfzmO8rbcDj90/q60ekCYIz1QzFtJpp6WDMYtbcmW I9W8dErov/iZSrRpw8selIvjYjJ//2cJ4vm6m9NBg3euT4NasiywidByaF5kOEZE l5vBcSbDM6/am6b/ukSvRBX33LT5brPv4JQa33haGsKHgNoqc34= =ZIok -----END PGP SIGNATURE----- --------------------------------------------------------------------- To unsubscribe, e-mail: users-unsubscr...@tomcat.apache.org For additional commands, e-mail: users-h...@tomcat.apache.org
