MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 12/01/01 through 12/31/01
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 68,090 3,583,633
MED90 14,468 232,625
MED85 11,567 100,091
MED80 10,213 47,779
MED75 9,578 28,578
MED66 9,698 40,276
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 2,106 74,179
2-4 a.m. 983 23,109
4-6 a.m. 418 21,230
6-8 a.m. 1,423 69,847
8-10 a.m. 8,260 295,979
10-12 a.m. 20,612 649,137
12-2 p.m. 21,966 755,882
2-4 p.m. 26,917 820,673
4-6 p.m. 19,813 645,853
6-8 p.m. 9,607 289,623
8-10 p.m. 6,321 218,283
10-12 p.m. 5,188 169,187
__________ _____________ _________________
Total: 123,614 4,032,982
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 1,106
Davis 1,263
Irvine 605
Los Angeles 1,439
Riverside 210
San Diego 1,572
San Francisco 2,250
Santa Barbara 32
Santa Cruz 38
Lawrence Berkeley 92
Lawrence Livermore 28
Los Alamos 0
MELWEB 0
Searchlight 21,008
Other - UC 93,218
Other-Network UC 753
_____
123,614
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 12,317
Davis 16,008
Irvine 2,225
Los Angeles 25,835
Riverside 1,628
San Diego 12,390
San Francisco 43,200
Santa Barbara 307
Santa Cruz 529
Lawrence Berkeley 2,200
Lawrence Livermore 533
Los Alamos 0
MELWEB 0
Searchlight 0
Other - UC 3,908,057
Other-Network UC 7,753
_____
4,032,982
1.3 Response time
__________________
Search response time from receipt of search request
DLA until transmission of search response:
Average in seconds 0.7
Standard deviation in seconds 1.9
Present response time from receipt of present request
DLA until transmission of a present response:
Average in seconds 0.1
Standard deviation in seconds 0.3
2.0 MEDLINE AND MEDLINE Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 20:35
Average session length (minutes:seconds) 15:58
Longest session recorded (minutes:seconds) 336:00
Average number of searches completed per session 0.0
Retrievals per search - median 2.0
Retrievals per search - average 517.2
Retrievals per search - standard deviation 8061.2
Percent of searches completed with 0 results 35.0%
Percent of searches entered that are long 0.0%
Percent of long searches completed
(includes partial results) 100%
Commands entered, by type, excluding errors:
Total Percentage
__________ __________
SEARCH 123,614 13.5%
PRESENT 732,317 80.0%
INIT or CLOSE 58,991 6.4%
OTHER 412 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 8,435 5.1% 3,224 38.2% 4 1685.5 23503.0
PERSONAL AUTHOR 41,022 24.8% 11,450 27.9% 7 88.0 765.9
TITLE WORD 14,831 9.0% 5,459 36.8% 3 168.8 2328.5
SUBSET 142 0.1% 52 36.6% 29 1141.8 4459.6
SUBJECT WORD 229 0.1% 106 46.3% 14 335.6 1725.9
SUBJECT 1,936 1.2% 1,050 54.2% 21 455.5 2306.8
EXACT SUBJECT 4,296 2.6% 1,170 27.2% 25 486.9 3517.9
MAJOR SUBJECT 64 0.0% 19 29.7% 29 478.2 1522.2
EXACT MAJOR SUBJ 322 0.2% 46 14.3% 20 429.4 1517.4
EXACT TITLE 1,546 0.9% 817 52.8% 1 18.6 186.9
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 1,534 0.9% 375 24.4% 346 1837.9 3688.4
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 13 0.0% 12 92.3% 1 1.0 0.0
KEYWORD 71,292 43.0% 27,610 38.7% 17 1106.3 10713.1
DATE 3,329 2.0% 745 22.4% 6 151.9 1345.4
LANGUAGE 6,214 3.8% 1,788 28.8% 21 467.0 3303.1
UNIQUE ID 473 0.3% 132 27.9% 1 1.0 0.3
ADDED 44 0.0% 34 77.3% 8 13.7 14.6
PUB TYPE 3,402 2.1% 753 22.1% 23 250.7 2568.4
AUTHOR AFFIL. 1,132 0.7% 495 43.7% 11 102.7 1421.6
CHEMICAL NAME 5 0.0% 3 60.0% 10 10.0 2.8
EXACT CHEMICAL 2 0.0% 1 50.0% 45 45.0 0.0
AT 4,937 3.0% 1,680 34.0% 19 898.1 8084.8
AGE 103 0.1% 25 24.3% 29 130.6 388.3
ISN 5 0.0% 5 100% 0 0.0 0.0
ARTICLE 117 0.1% 24 20.5% 32 1012.9 5081.5
XXS 58 0.0% 23 39.7% 9 2023.5 7916.9
XMXS 69 0.0% 17 24.6% 53 155.3 376.0
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 70 0.0% 65 92.9% 7 6124.2 13472.1
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 30,943 25.0% 10,358 33.5% 6 285.0 3644.2
Single 92,671 75.0% 32,892 35.5% 15 971.2 11374.8
PRESENT commands, by type:
MARC 29.5%
OPAC 25.7%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS