MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 02/24/01 through 03/02/01
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 54,513 2,888,766
MED90 11,706 205,088
MED85 9,245 83,785
MED80 8,107 49,832
MED75 7,709 31,799
MED66 7,845 29,705
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 2,731 45,181
2-4 a.m. 841 14,612
4-6 a.m. 376 12,770
6-8 a.m. 1,244 38,756
8-10 a.m. 7,006 235,673
10-12 a.m. 16,370 546,954
12-2 p.m. 17,070 584,442
2-4 p.m. 19,631 668,584
4-6 p.m. 16,105 537,995
6-8 p.m. 8,484 275,099
8-10 p.m. 5,851 197,852
10-12 p.m. 3,416 131,057
__________ _____________ _________________
Total: 99,125 3,288,975
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 170
Davis 934
Irvine 167
Los Angeles 897
Riverside 42
San Diego 643
San Francisco 1,051
Santa Barbara 47
Santa Cruz 40
Lawrence Berkeley 26
Lawrence Livermore 7
Los Alamos 0
MELWEB 78,309
Searchlight 15,951
Other - UC 136
Other-Network UC 705
_____
99,125
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 1,299
Davis 8,944
Irvine 1,726
Los Angeles 5,671
Riverside 420
San Diego 7,157
San Francisco 8,155
Santa Barbara 291
Santa Cruz 93
Lawrence Berkeley 320
Lawrence Livermore 113
Los Alamos 0
MELWEB 3,247,321
Searchlight 0
Other - UC 640
Other-Network UC 6,825
_____
3,288,975
1.3 Response time
__________________
Search response time from receipt of search request
DLA until transmission of search response:
Average in seconds 0.8
Standard deviation in seconds 2.5
Present response time from receipt of present request
DLA until transmission of a present response:
Average in seconds 0.2
Standard deviation in seconds 0.6
2.0 MEDLINE AND MEDLINE Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 20:46
Average session length (minutes:seconds) 17:18
Longest session recorded (minutes:seconds) 303:35
Average number of searches completed per session 0.0
Retrievals per search - median 2.0
Retrievals per search - average 351.5
Retrievals per search - standard deviation 4146.2
Percent of searches completed with 0 results 36.3%
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 99,125 14.1%
PRESENT 557,424 79.5%
INIT or CLOSE 43,944 6.3%
OTHER 433 0.1%
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 6,207 4.5% 2,473 39.8% 4 846.8 4022.7
PERSONAL AUTHOR 26,780 19.3% 8,255 30.8% 7 77.5 621.4
TITLE WORD 11,081 8.0% 4,586 41.4% 3 200.7 2771.2
SUBSET 251 0.2% 83 33.1% 15 270.6 1056.2
SUBJECT WORD 161 0.1% 85 52.8% 14 427.4 1904.9
SUBJECT 3,088 2.2% 1,801 58.3% 18 464.5 2462.3
EXACT SUBJECT 5,771 4.2% 1,698 29.4% 36 558.4 4194.5
MAJOR SUBJECT 160 0.1% 78 48.7% 27 658.7 3601.2
EXACT MAJOR SUBJ 545 0.4% 117 21.5% 29 289.7 820.6
EXACT TITLE 585 0.4% 334 57.1% 1 26.6 228.9
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 1,295 0.9% 425 32.8% 313 1647.1 3294.7
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 33 0.0% 23 69.7% 53 349.4 577.9
KEYWORD 60,963 44.0% 22,981 37.7% 18 685.0 6219.2
DATE 1,899 1.4% 579 30.5% 8 128.5 495.6
LANGUAGE 7,889 5.7% 2,484 31.5% 27 339.9 1734.7
UNIQUE ID 304 0.2% 46 15.1% 1 1.1 0.7
ADDED 1,157 0.8% 1,157 100% 0 0.0 0.0
PUB TYPE 3,173 2.3% 815 25.7% 23 166.0 585.4
AUTHOR AFFIL. 753 0.5% 349 46.3% 9 57.4 294.3
CHEMICAL NAME 3 0.0% 3 100% 0 0.0 0.0
EXACT CHEMICAL 0 0.0% 0 0.0% 0 0.0 0.0
AT 5,826 4.2% 1,837 31.5% 24 476.0 3220.4
AGE 194 0.1% 57 29.4% 35 432.6 3271.9
ISN 3 0.0% 3 100% 0 0.0 0.0
ARTICLE 135 0.1% 32 23.7% 77 599.1 2417.0
XXS 307 0.2% 175 57.0% 18 3271.1 22270.3
XMXS 60 0.0% 39 65.0% 15 395.3 1028.2
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 69 0.0% 62 89.9% 5 17.0 24.9
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 26,583 26.8% 10,115 38.0% 8 241.4 2069.7
Single 72,542 73.2% 25,895 35.7% 16 661.7 5901.1
PRESENT commands, by type:
MARC 29.0%
OPAC 27.2%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS