MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 07/28/01 through 08/03/01
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 40,073 2,117,428
MED90 7,746 121,716
MED85 5,816 53,659
MED80 5,070 27,049
MED75 4,689 15,101
MED66 4,809 23,045
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 1,674 64,152
2-4 a.m. 669 20,651
4-6 a.m. 204 12,614
6-8 a.m. 946 29,760
8-10 a.m. 5,198 176,425
10-12 a.m. 11,772 367,346
12-2 p.m. 11,769 410,052
2-4 p.m. 15,539 543,009
4-6 p.m. 11,079 387,921
6-8 p.m. 5,014 161,014
8-10 p.m. 2,522 111,514
10-12 p.m. 1,817 73,540
__________ _____________ _________________
Total: 68,203 2,357,998
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 359
Davis 856
Irvine 234
Los Angeles 566
Riverside 85
San Diego 621
San Francisco 909
Santa Barbara 117
Santa Cruz 25
Lawrence Berkeley 138
Lawrence Livermore 1
Los Alamos 0
MELWEB 0
Searchlight 4,056
Other - UC 59,907
Other-Network UC 329
_____
68,203
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 3,364
Davis 6,844
Irvine 2,478
Los Angeles 4,903
Riverside 1,040
San Diego 7,749
San Francisco 9,302
Santa Barbara 1,071
Santa Cruz 115
Lawrence Berkeley 385
Lawrence Livermore 0
Los Alamos 0
MELWEB 0
Searchlight 0
Other - UC 2,318,022
Other-Network UC 2,725
_____
2,357,998
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 3.2
Present response time from receipt of present request
DLA until transmission of a present response:
Average in seconds 0.2
Standard deviation in seconds 0.4
2.0 MEDLINE AND MEDLINE Databases Detailed Statistics
_________________________________________
Median session length (minutes:seconds) 21:44
Average session length (minutes:seconds) 20:59
Longest session recorded (minutes:seconds) 253:05
Average number of searches completed per session 0.0
Retrievals per search - median 2.0
Retrievals per search - average 289.9
Retrievals per search - standard deviation 3575.5
Percent of searches completed with 0 results 34.4%
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 68,203 13.2%
PRESENT 420,762 81.4%
INIT or CLOSE 27,364 5.3%
OTHER 661 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 4,325 4.5% 1,789 41.4% 4 795.2 4457.8
PERSONAL AUTHOR 22,892 23.7% 7,062 30.8% 7 76.8 753.8
TITLE WORD 9,850 10.2% 4,147 42.1% 2 126.4 1262.2
SUBSET 123 0.1% 22 17.9% 17 205.0 633.3
SUBJECT WORD 142 0.1% 48 33.8% 13 811.9 5916.3
SUBJECT 1,504 1.6% 683 45.4% 20 580.1 5034.2
EXACT SUBJECT 3,941 4.1% 1,009 25.6% 31 545.2 3859.4
MAJOR SUBJECT 92 0.1% 28 30.4% 17 64.6 119.4
EXACT MAJOR SUBJ 298 0.3% 78 26.2% 23 281.2 1340.6
EXACT TITLE 593 0.6% 363 61.2% 1 26.3 265.9
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 842 0.9% 255 30.3% 372 1691.2 3204.0
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 13 0.0% 6 46.2% 9 423.9 1098.5
KEYWORD 37,887 39.2% 13,381 35.3% 15 568.3 5569.7
DATE 1,848 1.9% 412 22.3% 4 55.6 275.9
LANGUAGE 4,967 5.1% 1,344 27.1% 23 319.6 1825.4
UNIQUE ID 128 0.1% 89 69.5% 1 1.0 0.0
ADDED 1,070 1.1% 446 41.7% 5 17.8 42.8
PUB TYPE 2,285 2.4% 491 21.5% 24 213.6 1858.3
AUTHOR AFFIL. 816 0.8% 359 44.0% 4 37.4 425.9
CHEMICAL NAME 14 0.0% 11 78.6% 42 28.3 23.7
EXACT CHEMICAL 2 0.0% 2 100% 0 0.0 0.0
AT 2,506 2.6% 879 35.1% 16 412.3 2400.0
AGE 115 0.1% 34 29.6% 19 148.4 699.9
ISN 0 0.0% 0 0.0% 0 0.0 0.0
ARTICLE 98 0.1% 33 33.7% 57 468.1 1195.7
XXS 114 0.1% 43 37.7% 9 82.9 292.5
XMXS 87 0.1% 34 39.1% 3 123.2 638.7
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 49 0.1% 40 81.6% 2 8.6 14.7
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 19,913 29.2% 7,133 35.8% 6 195.3 2091.2
Single 48,290 70.8% 16,330 33.8% 15 540.6 5040.4
PRESENT commands, by type:
MARC 27.5%
OPAC 32.8%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS