Skip to content

Compute cache_ratio as a percent value on the last period. #3

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 1 commit into from
Dec 12, 2012
Merged

Compute cache_ratio as a percent value on the last period. #3

Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
19 changes: 15 additions & 4 deletions mongodb.py
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -18,6 +18,8 @@ def __init__(self):

self.lockTotalTime = None
self.lockTime = None
self.accesses = None
self.misses = None

def submit(self, type, instance, value, db=None):
if db:
Expand Down Expand Up @@ -63,12 +65,21 @@ def do_server_status(self):


# indexes
accesses = server_status['indexCounters']['btree']['accesses']
misses = server_status['indexCounters']['btree']['misses']
if misses:
self.submit('cache_ratio', 'cache_misses', accesses / float(misses))
accesses = None
misses = None
if self.accesses is not None:
accesses = server_status['indexCounters']['btree']['accesses'] - self.accesses
if accesses < 0:
accesses = None
misses = (server_status['indexCounters']['btree']['misses'] or 0) - (self.misses or 0)
if misses < 0:
misses = None
if accesses and misses is not None:
self.submit('cache_ratio', 'cache_misses', int(misses * 100 / float(accesses)))
else:
self.submit('cache_ratio', 'cache_misses', 0)
self.accesses = server_status['indexCounters']['btree']['accesses']
self.misses = server_status['indexCounters']['btree']['misses']

for mongo_db in self.mongo_db:
db = con[mongo_db]
Expand Down