MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS
Time period: 07/21/01 through 07/27/01
1.0 SUMMARY STATISTICS
_______________________
Relative use of MEDLINE AND MEDLINE databases:
Number of
Searches Records Presented
________ _________________
MED (current) 43,323 2,422,994
MED90 8,397 157,869
MED85 6,496 57,576
MED80 5,666 38,273
MED75 5,179 17,723
MED66 5,392 26,233
Per hour usage:
Time Searches Records Presented
_______________ _____________ _________________
12-2 a.m. 1,720 53,024
2-4 a.m. 807 30,851
4-6 a.m. 255 24,999
6-8 a.m. 1,261 44,250
8-10 a.m. 5,614 196,895
10-12 a.m. 13,413 472,018
12-2 p.m. 12,578 499,421
2-4 p.m. 15,302 538,336
4-6 p.m. 13,221 477,346
6-8 p.m. 5,675 189,124
8-10 p.m. 2,849 116,281
10-12 p.m. 1,758 78,123
__________ _____________ _________________
Total: 74,453 2,720,668
1.1 SEARCH commands
____________________
Zero results may indicate no access to the database
Number of SEARCH commands issued by location:
Location Total
________ _____
Berkeley 439
Davis 362
Irvine 109
Los Angeles 695
Riverside 145
San Diego 418
San Francisco 1,185
Santa Barbara 321
Santa Cruz 7
Lawrence Berkeley 203
Lawrence Livermore 11
Los Alamos 9
MELWEB 366
Searchlight 5,434
Other - UC 64,394
Other-Network UC 355
_____
74,453
1.2 Records Presented
______________________
Zero results may indicate no access to the database
Number of Records Presented by location:
Location Total
________ _____
Berkeley 4,997
Davis 6,575
Irvine 1,194
Los Angeles 5,125
Riverside 726
San Diego 4,046
San Francisco 11,532
Santa Barbara 4,049
Santa Cruz 32
Lawrence Berkeley 3,856
Lawrence Livermore 49
Los Alamos 156
MELWEB 0
Searchlight 0
Other - UC 2,675,349
Other-Network UC 2,982
_____
2,720,668
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 2.4
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) 21:31
Average session length (minutes:seconds) 20:02
Longest session recorded (minutes:seconds) 247:13
Average number of searches completed per session 0.0
Retrievals per search - median 3.0
Retrievals per search - average 559.5
Retrievals per search - standard deviation 6004.2
Percent of searches completed with 0 results 31.9%
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 74,453 12.7%
PRESENT 479,241 81.8%
INIT or CLOSE 31,699 5.4%
OTHER 195 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 4,983 4.8% 1,756 35.2% 4 1072.2 5503.2
PERSONAL AUTHOR 24,139 23.1% 6,944 28.8% 7 79.3 754.0
TITLE WORD 9,061 8.7% 3,425 37.8% 3 216.8 2208.7
SUBSET 142 0.1% 22 15.5% 30 282.5 1205.9
SUBJECT WORD 61 0.1% 26 42.6% 11 3703.2 20574.9
SUBJECT 1,757 1.7% 838 47.7% 21 602.4 4496.6
EXACT SUBJECT 4,109 3.9% 958 23.3% 27 580.0 2947.1
MAJOR SUBJECT 192 0.2% 49 25.5% 26 257.1 1354.4
EXACT MAJOR SUBJ 458 0.4% 89 19.4% 20 149.1 436.1
EXACT TITLE 724 0.7% 442 61.0% 1 11.1 90.9
TREE NUMBER 0 0.0% 0 0.0% 0 0.0 0.0
EXACT JOURNAL 886 0.8% 209 23.6% 487 2086.1 3961.5
MAJOR TREE NUM 0 0.0% 0 0.0% 0 0.0 0.0
CAS 35 0.0% 26 74.3% 13 53.6 54.9
KEYWORD 42,485 40.6% 14,009 33.0% 17 1162.3 9322.7
DATE 1,712 1.6% 358 20.9% 5 111.5 1004.5
LANGUAGE 5,896 5.6% 1,641 27.8% 22 590.9 5837.5
UNIQUE ID 94 0.1% 43 45.7% 1 1.0 0.0
ADDED 1,207 1.2% 491 40.7% 4 19.4 44.0
PUB TYPE 2,724 2.6% 591 21.7% 22 136.4 501.9
AUTHOR AFFIL. 680 0.6% 335 49.3% 10 44.8 247.9
CHEMICAL NAME 5 0.0% 1 20.0% 42 50.8 54.2
EXACT CHEMICAL 1 0.0% 1 100% 0 0.0 0.0
AT 2,669 2.6% 818 30.6% 22 986.6 6217.9
AGE 134 0.1% 37 27.6% 42 260.8 850.7
ISN 0 0.0% 0 0.0% 0 0.0 0.0
ARTICLE 68 0.1% 4 5.9% 39 248.6 561.8
XXS 263 0.3% 111 42.2% 20 243.1 1194.5
XMXS 134 0.1% 70 52.2% 30 211.4 675.2
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 22 0.0% 15 68.2% 16 392.7 911.5
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 21,579 29.0% 7,118 33.0% 6 306.7 3772.1
Single 52,874 71.0% 16,630 31.4% 16 1027.1 8241.9
PRESENT commands, by type:
MARC 28.8%
OPAC 30.2%
SMDmm/dd srv.med MELSRV MEDLINE AND MEDLINE DATABASES Z39.50 SERVER STATISTICS