zc.monitor plugin to modify cache sizes
Project description
zc.montorcache is a zc.z3monitor plugin that allows one to modify or check the cache size (in objects or bytes) of a running instance.
>>> import zc.monitorcache >>> import zope.component >>> import zc.ngi.testing >>> import zc.monitor >>> import zc.monitor.interfaces >>> import zc.z3monitor >>> import zc.z3monitor.interfaces>>> connection = zc.ngi.testing.TextConnection() >>> server = zc.monitor.Server(connection)>>> zope.component.provideUtility(zc.monitorcache.cacheMonitor, ... zc.z3monitor.interfaces.IZ3MonitorPlugin, 'cache_size')>>> connection.test_input('cache_size\n') -> CLOSE
We have no databases right now. Let’s add a few so that we can test.
>>> import ZODB.tests.util >>> import ZODB.interfaces >>> main = ZODB.tests.util.DB() >>> zope.component.provideUtility(main, ZODB.interfaces.IDatabase) >>> test = ZODB.tests.util.DB() >>> zope.component.provideUtility( ... test, ZODB.interfaces.IDatabase, 'test')
Now we should get information on each of the database’s cache sizes
>>> connection = zc.ngi.testing.TextConnection() >>> server = zc.monitor.Server(connection)>>> connection.test_input('cache_size\n') DB cache sizes for main Max objects: 400 Max object size bytes: 0MB DB cache sizes for test Max objects: 400 Max object size bytes: 0MB -> CLOSE
We can request information about a specific db as well
>>> connection = zc.ngi.testing.TextConnection() >>> server = zc.monitor.Server(connection)>>> connection.test_input('cache_size -\n') DB cache sizes for main Max objects: 400 Max object size bytes: 0MB -> CLOSE>>> connection = zc.ngi.testing.TextConnection() >>> server = zc.monitor.Server(connection)>>> connection.test_input('cache_size test\n') DB cache sizes for test Max objects: 400 Max object size bytes: 0MB -> CLOSE
We can also modify cache sizes for a specific db
>>> connection = zc.ngi.testing.TextConnection() >>> server = zc.monitor.Server(connection)>>> connection.test_input('cache_size test 300\n') Set max objects to 300 -> CLOSE>>> connection = zc.ngi.testing.TextConnection() >>> server = zc.monitor.Server(connection)>>> connection.test_input('cache_size test 10MB\n') Set max object size bytes to 10MB -> CLOSE>>> connection = zc.ngi.testing.TextConnection() >>> server = zc.monitor.Server(connection)>>> connection.test_input('cache_size test\n') DB cache sizes for test Max objects: 300 Max object size bytes: 10MB -> CLOSE
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