MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 12/22/01 through 12/28/01
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 4,808 252,000
MED90 1,064 14,799
MED85 900 10,019
MED80 792 3,238
MED75 744 621
MED66 764 3,248
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 154 5,309
2-4 a.m. 141 3,760
4-6 a.m. 99 2,438
6-8 a.m. 145 3,076
8-10 a.m. 493 18,485
10-12 a.m. 1,573 60,211
12-2 p.m. 1,941 53,940
2-4 p.m. 2,005 59,724
4-6 p.m. 1,184 34,797
6-8 p.m. 528 17,704
8-10 p.m. 341 10,858
10-12 p.m. 468 13,623
__________ _____________ _________________
Total: 9,072 283,925
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 88
Davis 135
Irvine 6
Los Angeles 189
Riverside 3
San Diego 191
San Francisco 218
Santa Barbara 1
Santa Cruz 0
Lawrence Berkeley 0
Lawrence Livermore 0
Los Alamos 0
MELWEB 0
Searchlight 1,179
Other - UC 6,989
Other-Network UC 73
_____
9,072
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 2,105
Davis 1,164
Irvine 19
Los Angeles 3,732
Riverside 48
San Diego 327
San Francisco 2,227
Santa Barbara 22
Santa Cruz 0
Lawrence Berkeley 0
Lawrence Livermore 0
Los Alamos 0
MELWEB 0
Searchlight 0
Other - UC 273,440
Other-Network UC 841
_____
283,925
1.3 Response time
__________________
Search response time from receipt of search request
DLA until transmission of search response:
Average in seconds 0.5
Standard deviation in seconds 1.1
Present response time from receipt of present request
DLA until transmission of a present response:
Average in seconds 0.1
Standard deviation in seconds 0.1
2.0 MEDLINE AND MEDLINE Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 20:43
Average session length (minutes:seconds) 16:45
Longest session recorded (minutes:seconds) 153:34
Average number of searches completed per session 0.0
Retrievals per search - median 2.0
Retrievals per search - average 546.3
Retrievals per search - standard deviation 9762.8
Percent of searches completed with 0 results 35.5%
Percent of searches entered that are long 0.0%
Percent of long searches completed
(includes partial results) 0.0%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
SEARCH 9,072 13.7%
PRESENT 53,139 80.2%
INIT or CLOSE 4,035 6.1%
OTHER 21 0.0%
SEARCHes completed: RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. SEARCHes No. Index Median Avg. Dev.
______ _________ ______ _______ ______ __________ _______
By index:
JOURNAL 550 4.7% 174 31.6% 4 935.8 4236.1
PERSONAL AUTHOR 3,257 27.7% 876 26.9% 8 84.4 570.5
TITLE WORD 890 7.6% 322 36.2% 3 222.2 3319.7
SUBSET 34 0.3% 10 29.4% 7 25.7 71.1
SUBJECT WORD 20 0.2% 12 60.0% 6 108.6 279.1
SUBJECT 79 0.7% 35 44.3% 12 801.3 2967.0
EXACT SUBJECT 218 1.9% 67 30.7% 14 207.5 789.1
MAJOR SUBJECT 1 0.0% 0 0.0% 27 27.0 0.0
EXACT MAJOR SUBJ 29 0.2% 3 10.3% 40 216.2 288.0
EXACT TITLE 124 1.1% 68 54.8% 1 1.2 1.2
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 91 0.8% 24 26.4% 246 1412.6 2877.3
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 0 0.0% 0 0.0% 0 0.0 0.0
KEYWORD 5,194 44.2% 2,127 40.9% 17 1354.2 16616.3
DATE 233 2.0% 46 19.7% 6 88.1 782.5
LANGUAGE 399 3.4% 124 31.1% 14 142.2 429.8
UNIQUE ID 1 0.0% 1 100% 0 0.0 0.0
ADDED 0 0.0% 0 0.0% 0 0.0 0.0
PUB TYPE 203 1.7% 41 20.2% 19 169.1 451.2
AUTHOR AFFIL. 86 0.7% 39 45.3% 10 29.2 67.3
CHEMICAL NAME 0 0.0% 0 0.0% 0 0.0 0.0
EXACT CHEMICAL 0 0.0% 0 0.0% 0 0.0 0.0
AT 297 2.5% 86 29.0% 12 575.1 2621.4
AGE 14 0.1% 6 42.9% 1 66.8 121.8
ISN 0 0.0% 0 0.0% 0 0.0 0.0
ARTICLE 20 0.2% 8 40.0% 3 45.3 104.0
XXS 2 0.0% 1 50.0% 4 4.0 0.0
XMXS 0 0.0% 0 0.0% 0 0.0 0.0
XS 2 0 0.0% 0 0.0% 0 0.0 0.0
MXS 2 0 0.0% 0 0.0% 0 0.0 0.0
Other indexes 1 0.0% 1 100% 0 0.0 0.0
RETRIEVALS PER NON-
TOTAL ZERO RESULTS ZERO RESULT SEARCHES
_____________ ______________ ______________________
% of % of
all all for Std.
No. SEARCHes No. Index Median Avg. Dev.
______ _________ ______ _______ ______ __________ _______
By number of indexes:
Multiple 1,987 21.9% 640 32.2% 5 148.5 1126.0
Single 7,085 78.1% 2,583 36.5% 17 1056.5 13827.0
PRESENT commands, by type:
MARC 28.0%
OPAC 26.6%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS